99281232 has 120 divisors (see below), whose sum is σ = 295769760. Its totient is φ = 31000320.

The previous prime is 99281219. The next prime is 99281257. The reversal of 99281232 is 23218299.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (15552) is a multiple of the sum of its prime divisors (432).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 358278 + ... + 358554.

It is an arithmetic number, because the mean of its divisors is an integer number (2464748).

Almost surely, 2^99281232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99281232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147884880).

99281232 is an abundant number, since it is smaller than the sum of its proper divisors (196488528).

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

99281232 is a wasteful number, since it uses less digits than its factorization.

99281232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 432 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 99281232 is about 9963.9967884379. The cubic root of 99281232 is about 463.0441330829.

The spelling of 99281232 in words is "ninety-nine million, two hundred eighty-one thousand, two hundred thirty-two".