404993942 has 8 divisors (see below), whose sum is σ = 609638376. Its totient is φ = 201781152.

The previous prime is 404993933. The next prime is 404994017. The reversal of 404993942 is 249399404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 404993893 and 404993902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357203 + ... + 358334.

It is an arithmetic number, because the mean of its divisors is an integer number (76204797).

Almost surely, 2^404993942 is an apocalyptic number.

404993942 is a deficient number, since it is larger than the sum of its proper divisors (204644434).

404993942 is a wasteful number, since it uses less digits than its factorization.

404993942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715822.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 404993942 is about 20124.4612847152. The cubic root of 404993942 is about 739.8599333146.

The spelling of 404993942 in words is "four hundred four million, nine hundred ninety-three thousand, nine hundred forty-two".