1390942674 has 36 divisors (see below), whose sum is σ = 3312594558. Its totient is φ = 421497120.

The previous prime is 1390942667. The next prime is 1390942697. The reversal of 1390942674 is 4762490931.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 923734449 + 467208225 = 30393^2 + 21615^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 317139 + ... + 321494.

Almost surely, 2^1390942674 is an apocalyptic number.

1390942674 is an abundant number, since it is smaller than the sum of its proper divisors (1921651884).

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

1390942674 is a wasteful number, since it uses less digits than its factorization.

1390942674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638663 (or 638649 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 1390942674 is about 37295.3438648848. The cubic root of 1390942674 is about 1116.2712611888.

The spelling of 1390942674 in words is "one billion, three hundred ninety million, nine hundred forty-two thousand, six hundred seventy-four".