89220720 has 80 divisors (see below), whose sum is σ = 279758880. Its totient is φ = 23519232.

The previous prime is 89220707. The next prime is 89220731. The reversal of 89220720 is 2702298.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 19272 + ... + 23448.

It is an arithmetic number, because the mean of its divisors is an integer number (3496986).

Almost surely, 2^89220720 is an apocalyptic number.

89220720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89220720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139879440).

89220720 is an abundant number, since it is smaller than the sum of its proper divisors (190538160).

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

89220720 is a wasteful number, since it uses less digits than its factorization.

89220720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282 (or 4276 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 89220720 is about 9445.6720247953. The cubic root of 89220720 is about 446.8432904619.

It can be divided in two parts, 892 and 20720, that added together give a palindrome (21612).

The spelling of 89220720 in words is "eighty-nine million, two hundred twenty thousand, seven hundred twenty".