1387582664 has 32 divisors (see below), whose sum is σ = 2803603320. Its totient is φ = 640022016.

The previous prime is 1387582649. The next prime is 1387582681. The reversal of 1387582664 is 4662857831.

It can be written as a sum of positive squares in 4 ways, for example, as 540190564 + 847392100 = 23242^2 + 29110^2 .

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, 220814 + ... + 227010.

Almost surely, 2^1387582664 is an apocalyptic number.

It is an amenable number.

1387582664 is an abundant number, since it is smaller than the sum of its proper divisors (1416020656).

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

1387582664 is a wasteful number, since it uses less digits than its factorization.

1387582664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8369 (or 8365 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The square root of 1387582664 is about 37250.2706567348. The cubic root of 1387582664 is about 1115.3717017692.

The spelling of 1387582664 in words is "one billion, three hundred eighty-seven million, five hundred eighty-two thousand, six hundred sixty-four".