1985149884 has 12 divisors (see below), whose sum is σ = 4632016424. Its totient is φ = 661716624.

The previous prime is 1985149879. The next prime is 1985149889. The reversal of 1985149884 is 4889415891.

It is an interprime number because it is at equal distance from previous prime (1985149879) and next prime (1985149889).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985149889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82714567 + ... + 82714590.

Almost surely, 2^1985149884 is an apocalyptic number.

It is an amenable number.

1985149884 is an abundant number, since it is smaller than the sum of its proper divisors (2646866540).

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

1985149884 is a wasteful number, since it uses less digits than its factorization.

1985149884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165429164 (or 165429162 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 57.

The square root of 1985149884 is about 44555.0208618512. The cubic root of 1985149884 is about 1256.7949710183.

The spelling of 1985149884 in words is "one billion, nine hundred eighty-five million, one hundred forty-nine thousand, eight hundred eighty-four".