857388340 has 24 divisors (see below), whose sum is σ = 1822212000. Its totient is φ = 338822688.

The previous prime is 857388331. The next prime is 857388349. The reversal of 857388340 is 43883758.

857388340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (857388331) and next prime (857388349).

It is a super-2 number, since 2×857388340² = 1470229531135911200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857388349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256590 + ... + 259909.

It is an arithmetic number, because the mean of its divisors is an integer number (75925500).

Almost surely, 2^857388340 is an apocalyptic number.

It is an amenable number.

857388340 is an abundant number, since it is smaller than the sum of its proper divisors (964823660).

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

857388340 is a wasteful number, since it uses less digits than its factorization.

857388340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516591 (or 516589 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The square root of 857388340 is about 29281.1943062437. The cubic root of 857388340 is about 950.0049270289.

The spelling of 857388340 in words is "eight hundred fifty-seven million, three hundred eighty-eight thousand, three hundred forty".