40157679 has 8 divisors (see below), whose sum is σ = 55270912. Its totient is φ = 25908120.

The previous prime is 40157653. The next prime is 40157681. The reversal of 40157679 is 97675104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40157679 - 2²¹ = 38060527 is a prime.

It is a super-2 number, since 2×40157679² = 3225278365334082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40157629) 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, 215809 + ... + 215994.

It is an arithmetic number, because the mean of its divisors is an integer number (6908864).

Almost surely, 2^40157679 is an apocalyptic number.

40157679 is a deficient number, since it is larger than the sum of its proper divisors (15113233).

40157679 is a wasteful number, since it uses less digits than its factorization.

40157679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431837.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 40157679 is about 6337.0086791798. The cubic root of 40157679 is about 342.4439789739.

The spelling of 40157679 in words is "forty million, one hundred fifty-seven thousand, six hundred seventy-nine".