40813887 has 16 divisors (see below), whose sum is σ = 56816640. Its totient is φ = 26030400.

The previous prime is 40813879. The next prime is 40813897. The reversal of 40813887 is 78831804.

It is not a de Polignac number, because 40813887 - 2³ = 40813879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40813867) 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, 5812 + ... + 10742.

It is an arithmetic number, because the mean of its divisors is an integer number (3551040).

Almost surely, 2^40813887 is an apocalyptic number.

40813887 is a deficient number, since it is larger than the sum of its proper divisors (16002753).

40813887 is a wasteful number, since it uses less digits than its factorization.

40813887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5054.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 40813887 is about 6388.5747236766. The cubic root of 40813887 is about 344.2991780508.

The spelling of 40813887 in words is "forty million, eight hundred thirteen thousand, eight hundred eighty-seven".