1390435808 has 48 divisors (see below), whose sum is σ = 2974487040. Its totient is φ = 637372800.

The previous prime is 1390435807. The next prime is 1390435817. The reversal of 1390435808 is 8085340931.

It is a super-2 number, since 2×1390435808² = 3866623472337225728, which contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390435801) 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, 18038 + ... + 55733.

It is an arithmetic number, because the mean of its divisors is an integer number (61968480).

Almost surely, 2^1390435808 is an apocalyptic number.

It is an amenable number.

1390435808 is an abundant number, since it is smaller than the sum of its proper divisors (1584051232).

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

1390435808 is a wasteful number, since it uses less digits than its factorization.

1390435808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73831 (or 73823 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 1390435808 is about 37288.5479470574. The cubic root of 1390435808 is about 1116.1356532302.

The spelling of 1390435808 in words is "one billion, three hundred ninety million, four hundred thirty-five thousand, eight hundred eight".