89781285 has 16 divisors (see below), whose sum is σ = 156709440. Its totient is φ = 43530240.

The previous prime is 89781281. The next prime is 89781287. The reversal of 89781285 is 58218798.

It is not a de Polignac number, because 89781285 - 2² = 89781281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89781281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271900 + ... + 272229.

It is an arithmetic number, because the mean of its divisors is an integer number (9794340).

Almost surely, 2^89781285 is an apocalyptic number.

It is an amenable number.

89781285 is a deficient number, since it is larger than the sum of its proper divisors (66928155).

89781285 is a wasteful number, since it uses less digits than its factorization.

89781285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544148.

The product of its digits is 322560, while the sum is 48.

The square root of 89781285 is about 9475.2986760313. The cubic root of 89781285 is about 447.7771615116. Note that the first 3 decimals are identical.

The spelling of 89781285 in words is "eighty-nine million, seven hundred eighty-one thousand, two hundred eighty-five".