404339428 has 6 divisors (see below), whose sum is σ = 707594006. Its totient is φ = 202169712.

The previous prime is 404339423. The next prime is 404339473. The reversal of 404339428 is 824933404.

It can be written as a sum of positive squares in only one way, i.e., 273968704 + 130370724 = 16552^2 + 11418^2 .

It is not an unprimeable number, because it can be changed into a prime (404339423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50542425 + ... + 50542432.

Almost surely, 2^404339428 is an apocalyptic number.

It is an amenable number.

404339428 is a deficient number, since it is larger than the sum of its proper divisors (303254578).

404339428 is a wasteful number, since it uses less digits than its factorization.

404339428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101084861 (or 101084859 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 404339428 is about 20108.1930565628. The cubic root of 404339428 is about 739.4611538641.

The spelling of 404339428 in words is "four hundred four million, three hundred thirty-nine thousand, four hundred twenty-eight".