40158879 has 8 divisors (see below), whose sum is σ = 56694960. Its totient is φ = 25197696.

The previous prime is 40158869. The next prime is 40158889. The reversal of 40158879 is 97885104.

It is an interprime number because it is at equal distance from previous prime (40158869) and next prime (40158889).

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

It is not a de Polignac number, because 40158879 - 2⁷ = 40158751 is a prime.

It is a super-2 number, since 2×40158879² = 3225471125073282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40158879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40158869) 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, 393664 + ... + 393765.

It is an arithmetic number, because the mean of its divisors is an integer number (7086870).

Almost surely, 2^40158879 is an apocalyptic number.

40158879 is a deficient number, since it is larger than the sum of its proper divisors (16536081).

40158879 is a wasteful number, since it uses less digits than its factorization.

40158879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787449.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 40158879 is about 6337.1033603690. The cubic root of 40158879 is about 342.4473899336.

The spelling of 40158879 in words is "forty million, one hundred fifty-eight thousand, eight hundred seventy-nine".