30720404 has 48 divisors (see below), whose sum is σ = 64680000. Its totient is φ = 12579840.

The previous prime is 30720401. The next prime is 30720407. The reversal of 30720404 is 40402703.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30720401) and next prime (30720407).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30720401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23972 + ... + 25220.

It is an arithmetic number, because the mean of its divisors is an integer number (1347500).

Almost surely, 2^30720404 is an apocalyptic number.

It is an amenable number.

30720404 is an abundant number, since it is smaller than the sum of its proper divisors (33959596).

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

30720404 is a wasteful number, since it uses less digits than its factorization.

30720404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320 (or 1318 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 30720404 is about 5542.5990293363. The cubic root of 30720404 is about 313.1907842098.

The spelling of 30720404 in words is "thirty million, seven hundred twenty thousand, four hundred four".