1904669138 has 8 divisors (see below), whose sum is σ = 2866310832. Its totient is φ = 949232196.

The previous prime is 1904669113. The next prime is 1904669141. The reversal of 1904669138 is 8319664091.

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 = 1904669092 and 1904669101.

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, 1550420 + ... + 1551647.

It is an arithmetic number, because the mean of its divisors is an integer number (358288854).

Almost surely, 2^1904669138 is an apocalyptic number.

1904669138 is a deficient number, since it is larger than the sum of its proper divisors (961641694).

1904669138 is a wasteful number, since it uses less digits than its factorization.

1904669138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102376.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 1904669138 is about 43642.5152574872. The cubic root of 1904669138 is about 1239.5760643237.

The spelling of 1904669138 in words is "one billion, nine hundred four million, six hundred sixty-nine thousand, one hundred thirty-eight".