404000428 has 24 divisors (see below), whose sum is σ = 794491488. Its totient is φ = 178354176.

The previous prime is 404000423. The next prime is 404000449. The reversal of 404000428 is 824000404.

It is a junction number, because it is equal to n+sod(n) for n = 404000399 and 404000408.

It is not an unprimeable number, because it can be changed into a prime (404000423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167701 + ... + 170092.

It is an arithmetic number, because the mean of its divisors is an integer number (33103812).

Almost surely, 2^404000428 is an apocalyptic number.

It is an amenable number.

404000428 is a deficient number, since it is larger than the sum of its proper divisors (390491060).

404000428 is a wasteful number, since it uses less digits than its factorization.

404000428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337833 (or 337831 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 404000428 is about 20099.7618891369. The cubic root of 404000428 is about 739.2544402280.

The spelling of 404000428 in words is "four hundred four million, four hundred twenty-eight", and thus it is an aban number.