1904130626 has 4 divisors (see below), whose sum is σ = 2856195942. Its totient is φ = 952065312.

The previous prime is 1904130563. The next prime is 1904130643. The reversal of 1904130626 is 6260314091.

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., 1890075625 + 14055001 = 43475^2 + 3749^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1904130592 and 1904130601.

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, 476032655 + ... + 476032658.

Almost surely, 2^1904130626 is an apocalyptic number.

1904130626 is a deficient number, since it is larger than the sum of its proper divisors (952065316).

1904130626 is an equidigital number, since it uses as much as digits as its factorization.

1904130626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952065315.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 1904130626 is about 43636.3452410946. The cubic root of 1904130626 is about 1239.4592304701.

The spelling of 1904130626 in words is "one billion, nine hundred four million, one hundred thirty thousand, six hundred twenty-six".