30945456 has 40 divisors (see below), whose sum is σ = 88826160. Its totient is φ = 10315008.

The previous prime is 30945451. The next prime is 30945461. The reversal of 30945456 is 65454903.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30945451) and next prime (30945461).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 30945456.

It is not an unprimeable number, because it can be changed into a prime (30945451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35385 + ... + 36248.

It is an arithmetic number, because the mean of its divisors is an integer number (2220654).

Almost surely, 2^30945456 is an apocalyptic number.

30945456 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

30945456 is an abundant number, since it is smaller than the sum of its proper divisors (57880704).

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

30945456 is a wasteful number, since it uses less digits than its factorization.

30945456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71650 (or 71638 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 30945456 is about 5562.8640105615. The cubic root of 30945456 is about 313.9537167911.

The spelling of 30945456 in words is "thirty million, nine hundred forty-five thousand, four hundred fifty-six".