31648072 has 32 divisors (see below), whose sum is σ = 63540000. Its totient is φ = 14732928.

The previous prime is 31648051. The next prime is 31648087. The reversal of 31648072 is 27084613.

It is a super-2 number, since 2×31648072² = 2003200922634368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7204 + ... + 10732.

It is an arithmetic number, because the mean of its divisors is an integer number (1985625).

Almost surely, 2^31648072 is an apocalyptic number.

It is an amenable number.

31648072 is an abundant number, since it is smaller than the sum of its proper divisors (31891928).

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

31648072 is a wasteful number, since it uses less digits than its factorization.

31648072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613 (or 3609 counting only the distinct ones).

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

The square root of 31648072 is about 5625.6619166103. The cubic root of 31648072 is about 316.3120615389.

It can be divided in two parts, 3164 and 8072, that added together give a square (11236 = 106²).

The spelling of 31648072 in words is "thirty-one million, six hundred forty-eight thousand, seventy-two".