40161858 has 32 divisors (see below), whose sum is σ = 92240640. Its totient is φ = 11529360.

The previous prime is 40161857. The next prime is 40161881. The reversal of 40161858 is 85816104.

It is a super-2 number, since 2×40161858² = 3225949676024328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40161853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14760 + ... + 17267.

It is an arithmetic number, because the mean of its divisors is an integer number (2882520).

Almost surely, 2^40161858 is an apocalyptic number.

40161858 is an abundant number, since it is smaller than the sum of its proper divisors (52078782).

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

40161858 is a wasteful number, since it uses less digits than its factorization.

40161858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32062.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 40161858 is about 6337.3384003066. The cubic root of 40161858 is about 342.4558573475.

The spelling of 40161858 in words is "forty million, one hundred sixty-one thousand, eight hundred fifty-eight".