1390870390 has 96 divisors (see below), whose sum is σ = 3170077344. Its totient is φ = 435456000.

The previous prime is 1390870381. The next prime is 1390870391. The reversal of 1390870390 is 930780931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390870391) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 616765 + ... + 619015.

It is an arithmetic number, because the mean of its divisors is an integer number (33021639).

Almost surely, 2^1390870390 is an apocalyptic number.

1390870390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1390870390 is an abundant number, since it is smaller than the sum of its proper divisors (1779206954).

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

1390870390 is a wasteful number, since it uses less digits than its factorization.

1390870390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382 (or 2375 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 1390870390 is about 37294.3747769017. The cubic root of 1390870390 is about 1116.2519241950.

The spelling of 1390870390 in words is "one billion, three hundred ninety million, eight hundred seventy thousand, three hundred ninety".