40387518 has 16 divisors (see below), whose sum is σ = 89750160. Its totient is φ = 13462488.

The previous prime is 40387507. The next prime is 40387541. The reversal of 40387518 is 81578304.

40387518 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40387518² = 3262303220400648, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373905 + ... + 374012.

It is an arithmetic number, because the mean of its divisors is an integer number (5609385).

Almost surely, 2^40387518 is an apocalyptic number.

40387518 is an abundant number, since it is smaller than the sum of its proper divisors (49362642).

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

40387518 is a wasteful number, since it uses less digits than its factorization.

40387518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747928 (or 747922 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 40387518 is about 6355.1174654761. The cubic root of 40387518 is about 343.0960526805.

The spelling of 40387518 in words is "forty million, three hundred eighty-seven thousand, five hundred eighteen".