40157688 has 16 divisors (see below), whose sum is σ = 100394280. Its totient is φ = 13385888.

The previous prime is 40157687. The next prime is 40157699. The reversal of 40157688 is 88675104.

It is a super-2 number, since 2×40157688² = 3225279811010688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40157681) 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, 836595 + ... + 836642.

Almost surely, 2^40157688 is an apocalyptic number.

It is an amenable number.

40157688 is an abundant number, since it is smaller than the sum of its proper divisors (60236592).

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

40157688 is a wasteful number, since it uses less digits than its factorization.

40157688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673246 (or 1673242 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 40157688 is about 6337.0093892940. The cubic root of 40157688 is about 342.4440045563. Note that the first 3 decimals are identical.

The spelling of 40157688 in words is "forty million, one hundred fifty-seven thousand, six hundred eighty-eight".