404657042 has 16 divisors (see below), whose sum is σ = 618965592. Its totient is φ = 198357120.

The previous prime is 404657023. The next prime is 404657051. The reversal of 404657042 is 240756404.

It can be written as a sum of positive squares in 4 ways, for example, as 19280881 + 385376161 = 4391^2 + 19631^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32888 + ... + 43484.

Almost surely, 2^404657042 is an apocalyptic number.

404657042 is a deficient number, since it is larger than the sum of its proper divisors (214308550).

404657042 is a wasteful number, since it uses less digits than its factorization.

404657042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10973.

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 404657042 is about 20116.0891328310. The cubic root of 404657042 is about 739.6547220476.

The spelling of 404657042 in words is "four hundred four million, six hundred fifty-seven thousand, forty-two".