101985720 has 64 divisors (see below), whose sum is σ = 323961120. Its totient is φ = 25595904.

The previous prime is 101985713. The next prime is 101985733. The reversal of 101985720 is 27589101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22957 + ... + 27036.

Almost surely, 2^101985720 is an apocalyptic number.

101985720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101985720 is an abundant number, since it is smaller than the sum of its proper divisors (221975400).

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

101985720 is a wasteful number, since it uses less digits than its factorization.

101985720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50024 (or 50020 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 101985720 is about 10098.7979482709. The cubic root of 101985720 is about 467.2110676172.

The spelling of 101985720 in words is "one hundred one million, nine hundred eighty-five thousand, seven hundred twenty".