32640004 has 12 divisors (see below), whose sum is σ = 57164800. Its totient is φ = 16307208.

The previous prime is 32640001. The next prime is 32640007. The reversal of 32640004 is 40004623.

It is an interprime number because it is at equal distance from previous prime (32640001) and next prime (32640007).

It is a super-2 number, since 2×32640004² = 2130739722240032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (32640001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4717 + ... + 9355.

Almost surely, 2^32640004 is an apocalyptic number.

It is an amenable number.

32640004 is a deficient number, since it is larger than the sum of its proper divisors (24524796).

32640004 is a wasteful number, since it uses less digits than its factorization.

32640004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6402 (or 6400 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 32640004 is about 5713.1430929043. The cubic root of 32640004 is about 319.5828026730.

Adding to 32640004 its reverse (40004623), we get a palindrome (72644627).

The spelling of 32640004 in words is "thirty-two million, six hundred forty thousand, four".