40889640 has 64 divisors (see below), whose sum is σ = 133824960. Its totient is φ = 9912320.

The previous prime is 40889633. The next prime is 40889677. The reversal of 40889640 is 4698804.

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, 14169 + ... + 16808.

It is an arithmetic number, because the mean of its divisors is an integer number (2091015).

Almost surely, 2^40889640 is an apocalyptic number.

40889640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40889640 is an abundant number, since it is smaller than the sum of its proper divisors (92935320).

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

40889640 is a wasteful number, since it uses less digits than its factorization.

40889640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31002 (or 30998 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 40889640 is about 6394.5007623739. The cubic root of 40889640 is about 344.5120596440.

The spelling of 40889640 in words is "forty million, eight hundred eighty-nine thousand, six hundred forty".