1390857632 has 48 divisors (see below), whose sum is σ = 2844979200. Its totient is φ = 668532480.

The previous prime is 1390857617. The next prime is 1390857707. The reversal of 1390857632 is 2367580931.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218657 + ... + 224927.

It is an arithmetic number, because the mean of its divisors is an integer number (59270400).

Almost surely, 2^1390857632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390857632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1422489600).

1390857632 is an abundant number, since it is smaller than the sum of its proper divisors (1454121568).

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

1390857632 is a wasteful number, since it uses less digits than its factorization.

1390857632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6549 (or 6541 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 1390857632 is about 37294.2037319474. The cubic root of 1390857632 is about 1116.2485111797.

The spelling of 1390857632 in words is "one billion, three hundred ninety million, eight hundred fifty-seven thousand, six hundred thirty-two".