40521408 has 28 divisors (see below), whose sum is σ = 107213400. Its totient is φ = 13507072.

The previous prime is 40521373. The next prime is 40521413. The reversal of 40521408 is 80412504.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105333 + ... + 105716.

It is an arithmetic number, because the mean of its divisors is an integer number (3829050).

Almost surely, 2^40521408 is an apocalyptic number.

40521408 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40521408 is an abundant number, since it is smaller than the sum of its proper divisors (66691992).

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

40521408 is a wasteful number, since it uses less digits than its factorization.

40521408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211064 (or 211054 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 40521408 is about 6365.6427797984. The cubic root of 40521408 is about 343.4747708546.

It can be divided in two parts, 4052 and 1408, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 40521408 in words is "forty million, five hundred twenty-one thousand, four hundred eight".