1390037664 has 48 divisors (see below), whose sum is σ = 3652024320. Its totient is φ = 462942720.

The previous prime is 1390037659. The next prime is 1390037681. The reversal of 1390037664 is 4667300931.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 117124 + ... + 128444.

It is an arithmetic number, because the mean of its divisors is an integer number (76083840).

Almost surely, 2^1390037664 is an apocalyptic number.

It is an amenable number.

1390037664 is an abundant number, since it is smaller than the sum of its proper divisors (2261986656).

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

1390037664 is a wasteful number, since it uses less digits than its factorization.

1390037664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12613 (or 12605 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 1390037664 is about 37283.2088747736. The cubic root of 1390037664 is about 1116.0291098636.

The spelling of 1390037664 in words is "one billion, three hundred ninety million, thirty-seven thousand, six hundred sixty-four".