857401632 has 48 divisors (see below), whose sum is σ = 2500757280. Its totient is φ = 285800256.

The previous prime is 857401631. The next prime is 857401637. The reversal of 857401632 is 236104758.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (857401631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495318 + ... + 497045.

It is an arithmetic number, because the mean of its divisors is an integer number (52099110).

Almost surely, 2^857401632 is an apocalyptic number.

It is an amenable number.

857401632 is an abundant number, since it is smaller than the sum of its proper divisors (1643355648).

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

857401632 is a wasteful number, since it uses less digits than its factorization.

857401632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992382 (or 992368 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 857401632 is about 29281.4212769804. The cubic root of 857401632 is about 950.0098362786.

The spelling of 857401632 in words is "eight hundred fifty-seven million, four hundred one thousand, six hundred thirty-two".