89781552 has 60 divisors (see below), whose sum is σ = 287161680. Its totient is φ = 25651584.

The previous prime is 89781533. The next prime is 89781553. The reversal of 89781552 is 25518798.

It is a happy number.

89781552 is a `hidden beast` number, since 8 + 97 + 8 + 1 + 552 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 89781498 and 89781507.

It is not an unprimeable number, because it can be changed into a prime (89781553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43527 + ... + 45542.

It is an arithmetic number, because the mean of its divisors is an integer number (4786028).

Almost surely, 2^89781552 is an apocalyptic number.

It is an amenable number.

89781552 is an abundant number, since it is smaller than the sum of its proper divisors (197380128).

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

89781552 is a wasteful number, since it uses less digits than its factorization.

89781552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89090 (or 89081 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 89781552 is about 9475.3127652864. The cubic root of 89781552 is about 447.7776053917. Note that the first 3 decimals are identical.

The spelling of 89781552 in words is "eighty-nine million, seven hundred eighty-one thousand, five hundred fifty-two".