904889642 has 8 divisors (see below), whose sum is σ = 1357632036. Its totient is φ = 452345632.

The previous prime is 904889633. The next prime is 904889653. The reversal of 904889642 is 246988409.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 890365921 + 14523721 = 29839^2 + 3811^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37613 + ... + 56784.

Almost surely, 2^904889642 is an apocalyptic number.

904889642 is a deficient number, since it is larger than the sum of its proper divisors (452742394).

904889642 is a wasteful number, since it uses less digits than its factorization.

904889642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99192.

The product of its (nonzero) digits is 995328, while the sum is 50.

The square root of 904889642 is about 30081.3836450387. The cubic root of 904889642 is about 967.2347082032.

The spelling of 904889642 in words is "nine hundred four million, eight hundred eighty-nine thousand, six hundred forty-two".