99280400 has 30 divisors (see below), whose sum is σ = 238522122. Its totient is φ = 39712000.

The previous prime is 99280387. The next prime is 99280417. The reversal of 99280400 is 408299.

It can be written as a sum of positive squares in 3 ways, for example, as 3083536 + 96196864 = 1756^2 + 9808^2 .

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 5 ways as a sum of consecutive naturals, for example, 123701 + ... + 124500.

Almost surely, 2^99280400 is an apocalyptic number.

It is an amenable number.

99280400 is an abundant number, since it is smaller than the sum of its proper divisors (139241722).

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

99280400 is a wasteful number, since it uses less digits than its factorization.

99280400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248219 (or 248208 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 99280400 is about 9963.9550380359. The cubic root of 99280400 is about 463.0428396064.

Adding to 99280400 its reverse (408299), we get a palindrome (99688699).

The spelling of 99280400 in words is "ninety-nine million, two hundred eighty thousand, four hundred".