30438872 has 8 divisors (see below), whose sum is σ = 57072900. Its totient is φ = 15219432.

The previous prime is 30438871. The next prime is 30438917. The reversal of 30438872 is 27883403.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30438871) 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 as a sum of consecutive naturals, namely, 1902422 + ... + 1902437.

Almost surely, 2^30438872 is an apocalyptic number.

It is an amenable number.

30438872 is a deficient number, since it is larger than the sum of its proper divisors (26634028).

30438872 is a wasteful number, since it uses less digits than its factorization.

30438872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3804865 (or 3804861 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 30438872 is about 5517.1434637863. The cubic root of 30438872 is about 312.2311184751.

The spelling of 30438872 in words is "thirty million, four hundred thirty-eight thousand, eight hundred seventy-two".