857990490432 has 28 divisors (see below), whose sum is σ = 2270099839776. Its totient is φ = 285996830080.

The previous prime is 857990490431. The next prime is 857990490443. The reversal of 857990490432 is 234094099758.

It is a super-2 number, since 2×857990490432² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857990490431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2234350044 + ... + 2234350427.

Almost surely, 2^857990490432 is an apocalyptic number.

It is an amenable number.

857990490432 is an abundant number, since it is smaller than the sum of its proper divisors (1412109349344).

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

857990490432 is a wasteful number, since it uses less digits than its factorization.

857990490432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4468700486 (or 4468700476 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 60.

The spelling of 857990490432 in words is "eight hundred fifty-seven billion, nine hundred ninety million, four hundred ninety thousand, four hundred thirty-two".