30400816 has 20 divisors (see below), whose sum is σ = 60933600. Its totient is φ = 14676032.

The previous prime is 30400813. The next prime is 30400819. The reversal of 30400816 is 61800403.

It is an interprime number because it is at equal distance from previous prime (30400813) and next prime (30400819).

It is a super-2 number, since 2×30400816² = 1848419226931712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30400813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32296 + ... + 33223.

It is an arithmetic number, because the mean of its divisors is an integer number (3046680).

Almost surely, 2^30400816 is an apocalyptic number.

It is an amenable number.

30400816 is an abundant number, since it is smaller than the sum of its proper divisors (30532784).

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

30400816 is a wasteful number, since it uses less digits than its factorization.

30400816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65556 (or 65550 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 30400816 is about 5513.6934989170. The cubic root of 30400816 is about 312.1009425737.

The spelling of 30400816 in words is "thirty million, four hundred thousand, eight hundred sixteen".