1387590402 has 16 divisors (see below), whose sum is σ = 3027470112. Its totient is φ = 420481920.

The previous prime is 1387590401. The next prime is 1387590433. The reversal of 1387590402 is 2040957831.

It is not an unprimeable number, because it can be changed into a prime (1387590401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10511983 + ... + 10512114.

It is an arithmetic number, because the mean of its divisors is an integer number (189216882).

Almost surely, 2^1387590402 is an apocalyptic number.

1387590402 is an abundant number, since it is smaller than the sum of its proper divisors (1639879710).

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

1387590402 is a wasteful number, since it uses less digits than its factorization.

1387590402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21024113.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 1387590402 is about 37250.3745216072. The cubic root of 1387590402 is about 1115.3737750944.

The spelling of 1387590402 in words is "one billion, three hundred eighty-seven million, five hundred ninety thousand, four hundred two".