89765820 has 60 divisors (see below), whose sum is σ = 281603784. Its totient is φ = 23937120.

The previous prime is 89765791. The next prime is 89765821. The reversal of 89765820 is 2856798.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89765821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26086 + ... + 29325.

Almost surely, 2^89765820 is an apocalyptic number.

It is an amenable number.

89765820 is an abundant number, since it is smaller than the sum of its proper divisors (191837964).

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

89765820 is a wasteful number, since it uses less digits than its factorization.

89765820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55432 (or 55421 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 89765820 is about 9474.4825716236. The cubic root of 89765820 is about 447.7514498745.

The spelling of 89765820 in words is "eighty-nine million, seven hundred sixty-five thousand, eight hundred twenty".