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30888701 = 231342987
BaseRepresentation
bin111010111010…
…1001011111101
32011010022022222
41311311023331
530401414301
63022015125
7523356344
oct165651375
964108288
1030888701
1116488158
12a4174a5
13652664c
144160b5b
152aa231b
hex1d752fd

30888701 has 4 divisors (see below), whose sum is σ = 32231712. Its totient is φ = 29545692.

The previous prime is 30888691. The next prime is 30888721. The reversal of 30888701 is 10788803.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10788803 = 47229549.

It is a cyclic number.

It is not a de Polignac number, because 30888701 - 210 = 30887677 is a prime.

It is a super-2 number, since 2×308887012 = 1908223698934802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30888721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671471 + ... + 671516.

It is an arithmetic number, because the mean of its divisors is an integer number (8057928).

Almost surely, 230888701 is an apocalyptic number.

It is an amenable number.

30888701 is a deficient number, since it is larger than the sum of its proper divisors (1343011).

30888701 is a wasteful number, since it uses less digits than its factorization.

30888701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343010.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 30888701 is about 5557.7604302453. The cubic root of 30888701 is about 313.7616654657.

The spelling of 30888701 in words is "thirty million, eight hundred eighty-eight thousand, seven hundred one".

Divisors: 1 23 1342987 30888701