31449664 has 21 divisors (see below), whose sum is σ = 62497081. Its totient is φ = 15702400.

The previous prime is 31449647. The next prime is 31449673. The reversal of 31449664 is 46694413.

The square root of 31449664 is 5608.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 27123264 + 4326400 = 5208^2 + 2080^2 .

It is a Duffinian number.

It is an unprimeable number.

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 in 2 ways as a sum of consecutive naturals, for example, 44514 + ... + 45214.

Almost surely, 2^31449664 is an apocalyptic number.

31449664 is the 5608-th square number.

It is an amenable number.

31449664 is a deficient number, since it is larger than the sum of its proper divisors (31047417).

31449664 is an frugal number, since it uses more digits than its factorization.

31449664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414 (or 703 counting only the distinct ones).

The product of its digits is 62208, while the sum is 37.

The cubic root of 31449664 is about 315.6496678299.

The spelling of 31449664 in words is "thirty-one million, four hundred forty-nine thousand, six hundred sixty-four".