40921408 has 56 divisors (see below), whose sum is σ = 91037664. Its totient is φ = 18086400.

The previous prime is 40921381. The next prime is 40921427. The reversal of 40921408 is 80412904.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25263 + ... + 26833.

Almost surely, 2^40921408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40921408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45518832).

40921408 is an abundant number, since it is smaller than the sum of its proper divisors (50116256).

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

40921408 is a wasteful number, since it uses less digits than its factorization.

40921408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631 (or 1621 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 40921408 is about 6396.9842894914. The cubic root of 40921408 is about 344.6012560436.

The spelling of 40921408 in words is "forty million, nine hundred twenty-one thousand, four hundred eight".