99428480 has 64 divisors (see below), whose sum is σ = 238918680. Its totient is φ = 39567360.

The previous prime is 99428479. The next prime is 99428489. The reversal of 99428480 is 8482499.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 60590656 + 38837824 = 7784^2 + 6232^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×99428480² = 19772045270220800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99428489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215450 + ... + 215910.

Almost surely, 2^99428480 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 99428480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119459340).

99428480 is an abundant number, since it is smaller than the sum of its proper divisors (139490200).

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

99428480 is a wasteful number, since it uses less digits than its factorization.

99428480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 99428480 is about 9971.3830535187. The cubic root of 99428480 is about 463.2729398133.

The spelling of 99428480 in words is "ninety-nine million, four hundred twenty-eight thousand, four hundred eighty".