904381642 has 4 divisors (see below), whose sum is σ = 1356572466. Its totient is φ = 452190820.

The previous prime is 904381619. The next prime is 904381717. The reversal of 904381642 is 246183409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246183409 = 17 ⋅14481377.

It can be written as a sum of positive squares in only one way, i.e., 560316241 + 344065401 = 23671^2 + 18549^2 .

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 as a sum of consecutive naturals, namely, 226095409 + ... + 226095412.

Almost surely, 2^904381642 is an apocalyptic number.

904381642 is a deficient number, since it is larger than the sum of its proper divisors (452190824).

904381642 is a wasteful number, since it uses less digits than its factorization.

904381642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452190823.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 904381642 is about 30072.9386991029. The cubic root of 904381642 is about 967.0536742643.

The spelling of 904381642 in words is "nine hundred four million, three hundred eighty-one thousand, six hundred forty-two".