40518158 has 4 divisors (see below), whose sum is σ = 60777240. Its totient is φ = 20259078.

The previous prime is 40518151. The next prime is 40518187. The reversal of 40518158 is 85181504.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×40518158² = 3283442255425928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40518151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10129538 + ... + 10129541.

It is an arithmetic number, because the mean of its divisors is an integer number (15194310).

Almost surely, 2^40518158 is an apocalyptic number.

40518158 is a deficient number, since it is larger than the sum of its proper divisors (20259082).

40518158 is a wasteful number, since it uses less digits than its factorization.

40518158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20259081.

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 40518158 is about 6365.3874980240. The cubic root of 40518158 is about 343.4655878662.

The spelling of 40518158 in words is "forty million, five hundred eighteen thousand, one hundred fifty-eight".