40641408 has 48 divisors (see below), whose sum is σ = 116953200. Its totient is φ = 13546752.

The previous prime is 40641401. The next prime is 40641409. The reversal of 40641408 is 80414604.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40641401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16488 + ... + 18791.

It is an arithmetic number, because the mean of its divisors is an integer number (2436525).

Almost surely, 2^40641408 is an apocalyptic number.

40641408 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40641408 is an abundant number, since it is smaller than the sum of its proper divisors (76311792).

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

40641408 is a wasteful number, since it uses less digits than its factorization.

40641408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35299 (or 35284 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 40641408 is about 6375.0614114689. The cubic root of 40641408 is about 343.8134918313.

It can be divided in two parts, 406 and 41408, that added together give a palindrome (41814).

The spelling of 40641408 in words is "forty million, six hundred forty-one thousand, four hundred eight".