1390515804 has 18 divisors (see below), whose sum is σ = 3514915040. Its totient is φ = 463505256.

The previous prime is 1390515803. The next prime is 1390515823. The reversal of 1390515804 is 4085150931.

1390515804 is a `hidden beast` number, since 139 + 0 + 515 + 8 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 38625439 = 1390515804 / (1 + 3 + 9 + 0 + 5 + 1 + 5 + 8 + 0 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390515803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19312684 + ... + 19312755.

Almost surely, 2^1390515804 is an apocalyptic number.

It is an amenable number.

1390515804 is an abundant number, since it is smaller than the sum of its proper divisors (2124399236).

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

1390515804 is a wasteful number, since it uses less digits than its factorization.

1390515804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38625449 (or 38625444 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 1390515804 is about 37289.6205934037. The cubic root of 1390515804 is about 1116.1570577124.

The spelling of 1390515804 in words is "one billion, three hundred ninety million, five hundred fifteen thousand, eight hundred four".