99509472 has 144 divisors (see below), whose sum is σ = 299400192. Its totient is φ = 32503680.

The previous prime is 99509467. The next prime is 99509489. The reversal of 99509472 is 27490599.

It is a tau number, because it is divible by the number of its divisors (144).

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, 520897 + ... + 521087.

It is an arithmetic number, because the mean of its divisors is an integer number (2079168).

Almost surely, 2^99509472 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 99509472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149700096).

99509472 is an abundant number, since it is smaller than the sum of its proper divisors (199890720).

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

99509472 is a wasteful number, since it uses less digits than its factorization.

99509472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 99509472 is about 9975.4434487896. The cubic root of 99509472 is about 463.3986959298.

The spelling of 99509472 in words is "ninety-nine million, five hundred nine thousand, four hundred seventy-two".