1985839572 has 24 divisors (see below), whose sum is σ = 4637676736. Its totient is φ = 661367808.

The previous prime is 1985839553. The next prime is 1985839579. The reversal of 1985839572 is 2759385891.

It is a super-2 number, since 2×1985839572² = 7887117611442286368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985839579) 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, 57928 + ... + 85599.

Almost surely, 2^1985839572 is an apocalyptic number.

1985839572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1985839572 is an abundant number, since it is smaller than the sum of its proper divisors (2651837164).

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

1985839572 is a wasteful number, since it uses less digits than its factorization.

1985839572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144687 (or 144685 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 57.

The square root of 1985839572 is about 44562.7599235056. The cubic root of 1985839572 is about 1256.9405009276.

The spelling of 1985839572 in words is "one billion, nine hundred eighty-five million, eight hundred thirty-nine thousand, five hundred seventy-two".