40879440 has 120 divisors (see below), whose sum is σ = 156918528. Its totient is φ = 9342720.

The previous prime is 40879439. The next prime is 40879453. The reversal of 40879440 is 4497804.

40879440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×40879440² = 3342257229427200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 40879395 and 40879404.

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 23 ways as a sum of consecutive naturals, for example, 985 + ... + 9095.

Almost surely, 2^40879440 is an apocalyptic number.

40879440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40879440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78459264).

40879440 is an abundant number, since it is smaller than the sum of its proper divisors (116039088).

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

40879440 is a wasteful number, since it uses less digits than its factorization.

40879440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8137 (or 8128 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 40879440 is about 6393.7031523210. The cubic root of 40879440 is about 344.4834108612.

The spelling of 40879440 in words is "forty million, eight hundred seventy-nine thousand, four hundred forty".