1985791160 has 32 divisors (see below), whose sum is σ = 4471200000. Its totient is φ = 793752960.

The previous prime is 1985791151. The next prime is 1985791169. The reversal of 1985791160 is 611975891.

It is an interprime number because it is at equal distance from previous prime (1985791151) and next prime (1985791169).

It is a super-2 number, since 2×1985791160² = 7886733062268291200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985791169) 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, 41966 + ... + 75714.

It is an arithmetic number, because the mean of its divisors is an integer number (139725000).

Almost surely, 2^1985791160 is an apocalyptic number.

1985791160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1985791160 is an abundant number, since it is smaller than the sum of its proper divisors (2485408840).

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

1985791160 is a wasteful number, since it uses less digits than its factorization.

1985791160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35231 (or 35227 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 47.

The square root of 1985791160 is about 44562.2167312175. The cubic root of 1985791160 is about 1256.9302866923.

The spelling of 1985791160 in words is "one billion, nine hundred eighty-five million, seven hundred ninety-one thousand, one hundred sixty".