40889915 has 16 divisors (see below), whose sum is σ = 54837216. Its totient is φ = 29011200.

The previous prime is 40889903. The next prime is 40889963. The reversal of 40889915 is 51998804.

It is not a de Polignac number, because 40889915 - 2¹⁰ = 40888891 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6812 + ... + 11321.

It is an arithmetic number, because the mean of its divisors is an integer number (3427326).

Almost surely, 2^40889915 is an apocalyptic number.

40889915 is a deficient number, since it is larger than the sum of its proper divisors (13947301).

40889915 is a wasteful number, since it uses less digits than its factorization.

40889915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18190.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 40889915 is about 6394.5222651892. The cubic root of 40889915 is about 344.5128319717.

Subtracting 40889915 from its reverse (51998804), we obtain a square (11108889 = 3333²).

The spelling of 40889915 in words is "forty million, eight hundred eighty-nine thousand, nine hundred fifteen".