404650042 has 4 divisors (see below), whose sum is σ = 606975066. Its totient is φ = 202325020.

The previous prime is 404650039. The next prime is 404650069. The reversal of 404650042 is 240056404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 309372921 + 95277121 = 17589^2 + 9761^2 .

It is a junction number, because it is equal to n+sod(n) for n = 404649989 and 404650016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101162509 + ... + 101162512.

Almost surely, 2^404650042 is an apocalyptic number.

404650042 is a deficient number, since it is larger than the sum of its proper divisors (202325024).

404650042 is a wasteful number, since it uses less digits than its factorization.

404650042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202325023.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 404650042 is about 20115.9151419964. The cubic root of 404650042 is about 739.6504570261.

The spelling of 404650042 in words is "four hundred four million, six hundred fifty thousand, forty-two".