31004432 has 10 divisors (see below), whose sum is σ = 60071118. Its totient is φ = 15502208.

The previous prime is 31004431. The next prime is 31004453. The reversal of 31004432 is 23440013.

It can be written as a sum of positive squares in only one way, i.e., 28558336 + 2446096 = 5344^2 + 1564^2 .

It is a super-2 number, since 2×31004432² = 1922549607285248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31004432.

It is not an unprimeable number, because it can be changed into a prime (31004431) 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 as a sum of consecutive naturals, namely, 968873 + ... + 968904.

Almost surely, 2^31004432 is an apocalyptic number.

It is an amenable number.

31004432 is a deficient number, since it is larger than the sum of its proper divisors (29066686).

31004432 is a wasteful number, since it uses less digits than its factorization.

31004432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937785 (or 1937779 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 31004432 is about 5568.1623539548. The cubic root of 31004432 is about 314.1530350624.

Adding to 31004432 its reverse (23440013), we get a palindrome (54444445).

The spelling of 31004432 in words is "thirty-one million, four thousand, four hundred thirty-two".