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30283009 = 55032
BaseRepresentation
bin111001110000…
…1010100000001
32002222112110221
41303201110001
530223024014
63001023041
7515254441
oct163412401
962875427
1030283009
1116104089
12a184a81
136373a53
144044121
1529d2b24
hex1ce1501

30283009 has 3 divisors (see below), whose sum is σ = 30288513. Its totient is φ = 30277506.

The previous prime is 30282971. The next prime is 30283013. The reversal of 30283009 is 90038203.

It is a happy number.

The square root of 30283009 is 5503.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90038203 = 784111483.

It is a de Polignac number, because none of the positive numbers 2k-30283009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30283039) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2752 + ... + 8254.

It is an arithmetic number, because the mean of its divisors is an integer number (10096171).

Almost surely, 230283009 is an apocalyptic number.

30283009 is the 5503-rd square number.

30283009 is the 2752-nd centered octagonal number.

It is an amenable number.

30283009 is a deficient number, since it is larger than the sum of its proper divisors (5504).

30283009 is an frugal number, since it uses more digits than its factorization.

30283009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11006 (or 5503 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The cubic root of 30283009 is about 311.6972771877.

Multiplying 30283009 by its sum of digits (25), we get a square (757075225 = 275152).

Multiplying 30283009 by its product of nonzero digits (1296), we get a square (39246779664 = 1981082).

The spelling of 30283009 in words is "thirty million, two hundred eighty-three thousand, nine".

Divisors: 1 5503 30283009