1899140712 has 32 divisors (see below), whose sum is σ = 5426116800. Its totient is φ = 542611584.

The previous prime is 1899140689. The next prime is 1899140713. The reversal of 1899140712 is 2170419981.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1899140713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5652037 + ... + 5652372.

It is an arithmetic number, because the mean of its divisors is an integer number (169566150).

Almost surely, 2^1899140712 is an apocalyptic number.

1899140712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1899140712 is an abundant number, since it is smaller than the sum of its proper divisors (3526976088).

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

1899140712 is a wasteful number, since it uses less digits than its factorization.

1899140712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11304425 (or 11304421 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 1899140712 is about 43579.1316113573. The cubic root of 1899140712 is about 1238.3755853792.

The spelling of 1899140712 in words is "one billion, eight hundred ninety-nine million, one hundred forty thousand, seven hundred twelve".