89647920 has 120 divisors (see below), whose sum is σ = 304668000. Its totient is φ = 23620608.

The previous prime is 89647897. The next prime is 89647931. The reversal of 89647920 is 2974698.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63381 + ... + 64779.

It is an arithmetic number, because the mean of its divisors is an integer number (2538900).

Almost surely, 2^89647920 is an apocalyptic number.

89647920 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 89647920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152334000).

89647920 is an abundant number, since it is smaller than the sum of its proper divisors (215020080).

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

89647920 is a wasteful number, since it uses less digits than its factorization.

89647920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507 (or 1498 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 89647920 is about 9468.2585516028. The cubic root of 89647920 is about 447.5553357911. Note that the first 3 decimals are identical.

The spelling of 89647920 in words is "eighty-nine million, six hundred forty-seven thousand, nine hundred twenty".