157806940 has 12 divisors (see below), whose sum is σ = 331394616. Its totient is φ = 63122768.

The previous prime is 157806931. The next prime is 157806941. The reversal of 157806940 is 49608751.

It is a junction number, because it is equal to n+sod(n) for n = 157806893 and 157806902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157806941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3945154 + ... + 3945193.

It is an arithmetic number, because the mean of its divisors is an integer number (27616218).

Almost surely, 2^157806940 is an apocalyptic number.

157806940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157806940 is an abundant number, since it is smaller than the sum of its proper divisors (173587676).

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

157806940 is a wasteful number, since it uses less digits than its factorization.

157806940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7890356 (or 7890354 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 157806940 is about 12562.1232281808. The cubic root of 157806940 is about 540.3917367837.

The spelling of 157806940 in words is "one hundred fifty-seven million, eight hundred six thousand, nine hundred forty".