1390137500 has 36 divisors (see below), whose sum is σ = 3040758504. Its totient is φ = 556050000.

The previous prime is 1390137499. The next prime is 1390137523. The reversal of 1390137500 is 57310931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43106 + ... + 68105.

It is an arithmetic number, because the mean of its divisors is an integer number (84465514).

Almost surely, 2^1390137500 is an apocalyptic number.

1390137500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1390137500 is an abundant number, since it is smaller than the sum of its proper divisors (1650621004).

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

1390137500 is an equidigital number, since it uses as much as digits as its factorization.

1390137500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111240 (or 111218 counting only the distinct ones).

The product of its (nonzero) digits is 2835, while the sum is 29.

The square root of 1390137500 is about 37284.5477376352. The cubic root of 1390137500 is about 1116.0558278962.

The spelling of 1390137500 in words is "one billion, three hundred ninety million, one hundred thirty-seven thousand, five hundred".