40158685 has 24 divisors (see below), whose sum is σ = 59015520. Its totient is φ = 26085024.

The previous prime is 40158659. The next prime is 40158691. The reversal of 40158685 is 58685104.

It is not a de Polignac number, because 40158685 - 2¹¹ = 40156637 is a prime.

It is a super-2 number, since 2×40158685² = 3225439961858450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 342 + ... + 8968.

It is an arithmetic number, because the mean of its divisors is an integer number (2458980).

Almost surely, 2^40158685 is an apocalyptic number.

It is an amenable number.

40158685 is a deficient number, since it is larger than the sum of its proper divisors (18856835).

40158685 is a wasteful number, since it uses less digits than its factorization.

40158685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8665 (or 8658 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 40158685 is about 6337.0880536726. The cubic root of 40158685 is about 342.4468384998.

The spelling of 40158685 in words is "forty million, one hundred fifty-eight thousand, six hundred eighty-five".