40402464 has 24 divisors (see below), whose sum is σ = 106056720. Its totient is φ = 13467456.

The previous prime is 40402459. The next prime is 40402519. The reversal of 40402464 is 46420404.

It is a tau number, because it is divible by the number of its divisors (24).

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, 210334 + ... + 210525.

It is an arithmetic number, because the mean of its divisors is an integer number (4419030).

Almost surely, 2^40402464 is an apocalyptic number.

It is an amenable number.

40402464 is an abundant number, since it is smaller than the sum of its proper divisors (65654256).

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

40402464 is a wasteful number, since it uses less digits than its factorization.

40402464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420872 (or 420864 counting only the distinct ones).

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

The square root of 40402464 is about 6356.2932594398. The cubic root of 40402464 is about 343.1383700551.

Adding to 40402464 its reverse (46420404), we get a palindrome (86822868).

The spelling of 40402464 in words is "forty million, four hundred two thousand, four hundred sixty-four".