857660752 has 20 divisors (see below), whose sum is σ = 1789542580. Its totient is φ = 395843328.

The previous prime is 857660729. The next prime is 857660789. The reversal of 857660752 is 257066758.

It can be written as a sum of positive squares in 2 ways, for example, as 379626256 + 478034496 = 19484^2 + 21864^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2061477 + ... + 2061892.

It is an arithmetic number, because the mean of its divisors is an integer number (89477129).

Almost surely, 2^857660752 is an apocalyptic number.

It is an amenable number.

857660752 is an abundant number, since it is smaller than the sum of its proper divisors (931881828).

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

857660752 is a wasteful number, since it uses less digits than its factorization.

857660752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4123390 (or 4123384 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 46.

The square root of 857660752 is about 29285.8455913433. The cubic root of 857660752 is about 950.1055291819.

The spelling of 857660752 in words is "eight hundred fifty-seven million, six hundred sixty thousand, seven hundred fifty-two".