1390374986 has 128 divisors (see below), whose sum is σ = 2963423232. Its totient is φ = 471744000.

The previous prime is 1390374967. The next prime is 1390375111. The reversal of 1390374986 is 6894730931.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2668406 + ... + 2668926.

It is an arithmetic number, because the mean of its divisors is an integer number (23151744).

Almost surely, 2^1390374986 is an apocalyptic number.

1390374986 is an abundant number, since it is smaller than the sum of its proper divisors (1573048246).

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

1390374986 is a wasteful number, since it uses less digits than its factorization.

1390374986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628.

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 1390374986 is about 37287.7323794301. The cubic root of 1390374986 is about 1116.1193785744.

The spelling of 1390374986 in words is "one billion, three hundred ninety million, three hundred seventy-four thousand, nine hundred eighty-six".