1891472716 has 18 divisors (see below), whose sum is σ = 3850498428. Its totient is φ = 810631080.

The previous prime is 1891472711. The next prime is 1891472783. The reversal of 1891472716 is 6172741981.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1891472711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4824990 + ... + 4825381.

Almost surely, 2^1891472716 is an apocalyptic number.

It is an amenable number.

1891472716 is an abundant number, since it is smaller than the sum of its proper divisors (1959025712).

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

1891472716 is a wasteful number, since it uses less digits than its factorization.

1891472716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9650389 (or 9650380 counting only the distinct ones).

The product of its digits is 169344, while the sum is 46.

The square root of 1891472716 is about 43491.0647834702. The cubic root of 1891472716 is about 1236.7066432233.

The spelling of 1891472716 in words is "one billion, eight hundred ninety-one million, four hundred seventy-two thousand, seven hundred sixteen".