84157857 has 36 divisors (see below), whose sum is σ = 141635520. Its totient is φ = 47170080.

The previous prime is 84157849. The next prime is 84157861. The reversal of 84157857 is 75875148.

It is a happy number.

It is not a de Polignac number, because 84157857 - 2³ = 84157849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84157877) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 234244 + ... + 234602.

It is an arithmetic number, because the mean of its divisors is an integer number (3934320).

Almost surely, 2^84157857 is an apocalyptic number.

It is an amenable number.

84157857 is a deficient number, since it is larger than the sum of its proper divisors (57477663).

84157857 is a wasteful number, since it uses less digits than its factorization.

84157857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 430 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

The square root of 84157857 is about 9173.7591531498. The cubic root of 84157857 is about 438.2260826947.

The spelling of 84157857 in words is "eighty-four million, one hundred fifty-seven thousand, eight hundred fifty-seven".