404402428 has 24 divisors (see below), whose sum is σ = 720908720. Its totient is φ = 198443520.

The previous prime is 404402387. The next prime is 404402437. The reversal of 404402428 is 824204404.

It is a junction number, because it is equal to n+sod(n) for n = 404402396 and 404402405.

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, 126028 + ... + 129196.

Almost surely, 2^404402428 is an apocalyptic number.

It is an amenable number.

404402428 is a deficient number, since it is larger than the sum of its proper divisors (316506292).

404402428 is a wasteful number, since it uses less digits than its factorization.

404402428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3757 (or 3755 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

The square root of 404402428 is about 20109.7595211877. The cubic root of 404402428 is about 739.4995569402.

The spelling of 404402428 in words is "four hundred four million, four hundred two thousand, four hundred twenty-eight".