1899317842 has 16 divisors (see below), whose sum is σ = 2886710400. Its totient is φ = 937095120.

The previous prime is 1899317839. The next prime is 1899317923. The reversal of 1899317842 is 2487139981.

It is a self number, because there is not a number n which added to its sum of digits gives 1899317842.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500709 + ... + 504487.

It is an arithmetic number, because the mean of its divisors is an integer number (180419400).

Almost surely, 2^1899317842 is an apocalyptic number.

1899317842 is a deficient number, since it is larger than the sum of its proper divisors (987392558).

1899317842 is a wasteful number, since it uses less digits than its factorization.

1899317842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7041.

The product of its digits is 870912, while the sum is 52.

The square root of 1899317842 is about 43581.1638440278. The cubic root of 1899317842 is about 1238.4140846589.

The spelling of 1899317842 in words is "one billion, eight hundred ninety-nine million, three hundred seventeen thousand, eight hundred forty-two".