1390047885 has 80 divisors (see below), whose sum is σ = 2684573760. Its totient is φ = 685843200.

The previous prime is 1390047881. The next prime is 1390047899. The reversal of 1390047885 is 5887400931.

1390047885 is a `hidden beast` number, since 13 + 90 + 0 + 478 + 85 = 666.

It is not a de Polignac number, because 1390047885 - 2² = 1390047881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1390047885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390047881) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 328785 + ... + 332985.

It is an arithmetic number, because the mean of its divisors is an integer number (33557172).

Almost surely, 2^1390047885 is an apocalyptic number.

1390047885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1390047885 is a deficient number, since it is larger than the sum of its proper divisors (1294525875).

1390047885 is a wasteful number, since it uses less digits than its factorization.

1390047885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280 (or 4271 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 1390047885 is about 37283.3459469506. The cubic root of 1390047885 is about 1116.0318452585.

The spelling of 1390047885 in words is "one billion, three hundred ninety million, forty-seven thousand, eight hundred eighty-five".