1899427712 has 128 divisors (see below), whose sum is σ = 4688409600. Its totient is φ = 746403840.

The previous prime is 1899427681. The next prime is 1899427757. The reversal of 1899427712 is 2177249981.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×1899427712² = 7215651266227109888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2084537 + ... + 2085447.

It is an arithmetic number, because the mean of its divisors is an integer number (36628200).

Almost surely, 2^1899427712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1899427712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2344204800).

1899427712 is an abundant number, since it is smaller than the sum of its proper divisors (2788981888).

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

1899427712 is a wasteful number, since it uses less digits than its factorization.

1899427712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124 (or 1112 counting only the distinct ones).

The product of its digits is 508032, while the sum is 50.

The square root of 1899427712 is about 43582.4243474362. The cubic root of 1899427712 is about 1238.4379637466.

The spelling of 1899427712 in words is "one billion, eight hundred ninety-nine million, four hundred twenty-seven thousand, seven hundred twelve".