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30349081 = 727872
BaseRepresentation
bin111001111000…
…1011100011001
32010002220010001
41303301130121
530232132311
63002253001
7515651200
oct163613431
963086101
1030349081
1116149794
12a1b7161
136397b49
144060237
1529e74c1
hex1cf1719

30349081 has 9 divisors (see below), whose sum is σ = 35348949. Its totient is φ = 25980444.

The previous prime is 30349079. The next prime is 30349087. The reversal of 30349081 is 18094303.

The square root of 30349081 is 5509.

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

It is not a de Polignac number, because 30349081 - 21 = 30349079 is a prime.

It is a super-2 number, since 2×303490812 = 1842133435089122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30349087) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 38170 + ... + 38956.

It is an arithmetic number, because the mean of its divisors is an integer number (3927661).

Almost surely, 230349081 is an apocalyptic number.

30349081 is the 5509-th square number.

30349081 is the 2755-th centered octagonal number.

It is an amenable number.

30349081 is a deficient number, since it is larger than the sum of its proper divisors (4999868).

30349081 is an frugal number, since it uses more digits than its factorization.

30349081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The cubic root of 30349081 is about 311.9238013841.

The spelling of 30349081 in words is "thirty million, three hundred forty-nine thousand, eighty-one".

Divisors: 1 7 49 787 5509 38563 619369 4335583 30349081