1390808 has 8 divisors (see below), whose sum is σ = 2607780. Its totient is φ = 695400.

The previous prime is 1390801. The next prime is 1390813. The reversal of 1390808 is 8080931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86918 + ... + 86933.

2^1390808 is an apocalyptic number.

It is an amenable number.

1390808 is a deficient number, since it is larger than the sum of its proper divisors (1216972).

1390808 is a wasteful number, since it uses less digits than its factorization.

1390808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173857 (or 173853 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1390808 is about 1179.3252307994. The cubic root of 1390808 is about 111.6235233448.

The spelling of 1390808 in words is "one million, three hundred ninety thousand, eight hundred eight".