99147280 has 20 divisors (see below), whose sum is σ = 230517612. Its totient is φ = 39658880.

The previous prime is 99147277. The next prime is 99147341. The reversal of 99147280 is 8274199.

It can be written as a sum of positive squares in 2 ways, for example, as 32626944 + 66520336 = 5712^2 + 8156^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 619591 + ... + 619750.

Almost surely, 2^99147280 is an apocalyptic number.

It is an amenable number.

99147280 is an abundant number, since it is smaller than the sum of its proper divisors (131370332).

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

99147280 is a wasteful number, since it uses less digits than its factorization.

99147280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239354 (or 1239348 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 99147280 is about 9957.2727189728. The cubic root of 99147280 is about 462.8357902344.

The spelling of 99147280 in words is "ninety-nine million, one hundred forty-seven thousand, two hundred eighty".