89720920 has 32 divisors (see below), whose sum is σ = 202482000. Its totient is φ = 35779968.

The previous prime is 89720909. The next prime is 89720923. The reversal of 89720920 is 2902798.

It is a self number, because there is not a number n which added to its sum of digits gives 89720920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89720923) 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, 10747 + ... + 17173.

Almost surely, 2^89720920 is an apocalyptic number.

It is an amenable number.

89720920 is an abundant number, since it is smaller than the sum of its proper divisors (112761080).

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

89720920 is a wasteful number, since it uses less digits than its factorization.

89720920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6787 (or 6783 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 89720920 is about 9472.1127527073. The cubic root of 89720920 is about 447.6767837675.

The spelling of 89720920 in words is "eighty-nine million, seven hundred twenty thousand, nine hundred twenty".