40181859 has 32 divisors (see below), whose sum is σ = 62535680. Its totient is φ = 25466400.

The previous prime is 40181831. The next prime is 40181861. The reversal of 40181859 is 95818104.

It is not a de Polignac number, because 40181859 - 2⁷ = 40181731 is a prime.

It is a super-2 number, since 2×40181859² = 3229163585391762, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (40181879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50664 + ... + 51450.

It is an arithmetic number, because the mean of its divisors is an integer number (1954240).

Almost surely, 2^40181859 is an apocalyptic number.

40181859 is a deficient number, since it is larger than the sum of its proper divisors (22353821).

40181859 is a wasteful number, since it uses less digits than its factorization.

40181859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888 (or 882 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 40181859 is about 6338.9162322908. The cubic root of 40181859 is about 342.5126967073.

The spelling of 40181859 in words is "forty million, one hundred eighty-one thousand, eight hundred fifty-nine".