1904713640 has 16 divisors (see below), whose sum is σ = 4285605780. Its totient is φ = 761885440.

The previous prime is 1904713627. The next prime is 1904713667. The reversal of 1904713640 is 463174091.

It can be written as a sum of positive squares in 2 ways, for example, as 1686087844 + 218625796 = 41062^2 + 14786^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1904713640.

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, 23808881 + ... + 23808960.

Almost surely, 2^1904713640 is an apocalyptic number.

1904713640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1904713640 is an abundant number, since it is smaller than the sum of its proper divisors (2380892140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1904713640 is a wasteful number, since it uses less digits than its factorization.

1904713640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47617852 (or 47617848 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 1904713640 is about 43643.0251013836. The cubic root of 1904713640 is about 1239.5857183511.

The spelling of 1904713640 in words is "one billion, nine hundred four million, seven hundred thirteen thousand, six hundred forty".