408880640428 has 48 divisors (see below), whose sum is σ = 776189282400. Its totient is φ = 187342539264.

The previous prime is 408880640417. The next prime is 408880640437. The reversal of 408880640428 is 824046088804.

It is a super-2 number, since 2×408880640428² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14761600 + ... + 14789272.

It is an arithmetic number, because the mean of its divisors is an integer number (16170610050).

Almost surely, 2^408880640428 is an apocalyptic number.

It is an amenable number.

408880640428 is a deficient number, since it is larger than the sum of its proper divisors (367308641972).

408880640428 is a wasteful number, since it uses less digits than its factorization.

408880640428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29746 (or 29744 counting only the distinct ones).

The product of its (nonzero) digits is 3145728, while the sum is 52.

The spelling of 408880640428 in words is "four hundred eight billion, eight hundred eighty million, six hundred forty thousand, four hundred twenty-eight".