81284088 has 32 divisors (see below), whose sum is σ = 203529600. Its totient is φ = 27052128.

The previous prime is 81284057. The next prime is 81284101. The reversal of 81284088 is 88048218.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15445 + ... + 20027.

It is an arithmetic number, because the mean of its divisors is an integer number (6360300).

Almost surely, 2^81284088 is an apocalyptic number.

It is an amenable number.

81284088 is an abundant number, since it is smaller than the sum of its proper divisors (122245512).

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

81284088 is a wasteful number, since it uses less digits than its factorization.

81284088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5331 (or 5327 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 39.

The square root of 81284088 is about 9015.7688524052. The cubic root of 81284088 is about 433.1801151937.

The spelling of 81284088 in words is "eighty-one million, two hundred eighty-four thousand, eighty-eight".