89777538 has 16 divisors (see below), whose sum is σ = 199505760. Its totient is φ = 29925828.

The previous prime is 89777537. The next prime is 89777549. The reversal of 89777538 is 83577798.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1662547 = 89777538 / (8 + 9 + 7 + 7 + 7 + 5 + 3 + 8).

It is not an unprimeable number, because it can be changed into a prime (89777537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 831220 + ... + 831327.

It is an arithmetic number, because the mean of its divisors is an integer number (12469110).

Almost surely, 2^89777538 is an apocalyptic number.

89777538 is an abundant number, since it is smaller than the sum of its proper divisors (109728222).

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

89777538 is a wasteful number, since it uses less digits than its factorization.

89777538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662558 (or 1662552 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The square root of 89777538 is about 9475.1009493303. The cubic root of 89777538 is about 447.7709321348.

The spelling of 89777538 in words is "eighty-nine million, seven hundred seventy-seven thousand, five hundred thirty-eight".