1387907664 has 80 divisors (see below), whose sum is σ = 4212272064. Its totient is φ = 388224000.

The previous prime is 1387907663. The next prime is 1387907707. The reversal of 1387907664 is 4667097831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387907663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94237 + ... + 107964.

Almost surely, 2^1387907664 is an apocalyptic number.

It is an amenable number.

1387907664 is an abundant number, since it is smaller than the sum of its proper divisors (2824364400).

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

1387907664 is a wasteful number, since it uses less digits than its factorization.

1387907664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202236 (or 202230 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 51.

The square root of 1387907664 is about 37254.6327857355. The cubic root of 1387907664 is about 1115.4587758621.

The spelling of 1387907664 in words is "one billion, three hundred eighty-seven million, nine hundred seven thousand, six hundred sixty-four".