31872064 has 28 divisors (see below), whose sum is σ = 72282304. Its totient is φ = 13659264.

The previous prime is 31872031. The next prime is 31872077. The reversal of 31872064 is 46027813.

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35124 + ... + 36019.

Almost surely, 2^31872064 is an apocalyptic number.

It is an amenable number.

31872064 is an abundant number, since it is smaller than the sum of its proper divisors (40410240).

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

31872064 is an equidigital number, since it uses as much as digits as its factorization.

31872064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71162 (or 71152 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 31872064 is about 5645.5348727999. The cubic root of 31872064 is about 317.0565499992.

Adding to 31872064 its reverse (46027813), we get a palindrome (77899877).

The spelling of 31872064 in words is "thirty-one million, eight hundred seventy-two thousand, sixty-four".