100065720 has 64 divisors (see below), whose sum is σ = 300892320. Its totient is φ = 26622464.

The previous prime is 100065703. The next prime is 100065727. The reversal of 100065720 is 27560001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100065727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77722 + ... + 78998.

Almost surely, 2^100065720 is an apocalyptic number.

100065720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100065720 is an abundant number, since it is smaller than the sum of its proper divisors (200826600).

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

100065720 is a wasteful number, since it uses less digits than its factorization.

100065720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944 (or 1940 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 100065720 is about 10003.2854602875. The cubic root of 100065720 is about 464.2605428337.

The spelling of 100065720 in words is "one hundred million, sixty-five thousand, seven hundred twenty".