30919245 has 96 divisors (see below), whose sum is σ = 63037440. Its totient is φ = 12862080.

The previous prime is 30919219. The next prime is 30919247. The reversal of 30919245 is 54291903.

It is not a de Polignac number, because 30919245 - 2⁷ = 30919117 is a prime.

It is a super-2 number, since 2×30919245² = 1911999422740050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30919247) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 524026 + ... + 524084.

It is an arithmetic number, because the mean of its divisors is an integer number (656640).

Almost surely, 2^30919245 is an apocalyptic number.

30919245 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30919245 is an abundant number, since it is smaller than the sum of its proper divisors (32118195).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30919245 is a wasteful number, since it uses less digits than its factorization.

30919245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 30919245 is about 5560.5076207123. The cubic root of 30919245 is about 313.8650514815.

The spelling of 30919245 in words is "thirty million, nine hundred nineteen thousand, two hundred forty-five".