40869918 has 12 divisors (see below), whose sum is σ = 88551528. Its totient is φ = 13623300.

The previous prime is 40869901. The next prime is 40869923. The reversal of 40869918 is 81996804.

40869918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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 5 ways as a sum of consecutive naturals, for example, 1135258 + ... + 1135293.

It is an arithmetic number, because the mean of its divisors is an integer number (7379294).

Almost surely, 2^40869918 is an apocalyptic number.

40869918 is an abundant number, since it is smaller than the sum of its proper divisors (47681610).

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

40869918 is a wasteful number, since it uses less digits than its factorization.

40869918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270559 (or 2270556 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 40869918 is about 6392.9584700669. The cubic root of 40869918 is about 344.4566620787.

The spelling of 40869918 in words is "forty million, eight hundred sixty-nine thousand, nine hundred eighteen".