857072580 has 192 divisors, whose sum is σ = 2992496640. Its totient is φ = 178454016.

The previous prime is 857072537. The next prime is 857072591. The reversal of 857072580 is 85270758.

It is a happy number.

857072580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 430347 + ... + 432333.

It is an arithmetic number, because the mean of its divisors is an integer number (15585920).

Almost surely, 2^857072580 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 857072580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1496248320).

857072580 is an abundant number, since it is smaller than the sum of its proper divisors (2135424060).

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

857072580 is a wasteful number, since it uses less digits than its factorization.

857072580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098 (or 2096 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 42.

The square root of 857072580 is about 29275.8019531490. The cubic root of 857072580 is about 949.8882897269. Note that the first 3 decimals are identical.

The spelling of 857072580 in words is "eight hundred fifty-seven million, seventy-two thousand, five hundred eighty".