40640424 has 32 divisors (see below), whose sum is σ = 110838240. Its totient is φ = 12315200.

The previous prime is 40640417. The next prime is 40640437. The reversal of 40640424 is 42404604.

40640424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 40640394 and 40640403.

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 7 ways as a sum of consecutive naturals, for example, 76707 + ... + 77234.

It is an arithmetic number, because the mean of its divisors is an integer number (3463695).

Almost surely, 2^40640424 is an apocalyptic number.

40640424 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40640424 is an abundant number, since it is smaller than the sum of its proper divisors (70197816).

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

40640424 is a wasteful number, since it uses less digits than its factorization.

40640424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153961 (or 153957 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 40640424 is about 6374.9842352746. The cubic root of 40640424 is about 343.8107170324.

The spelling of 40640424 in words is "forty million, six hundred forty thousand, four hundred twenty-four".