99487872 has 128 divisors (see below), whose sum is σ = 320443200. Its totient is φ = 30136320.

The previous prime is 99487847. The next prime is 99487873. The reversal of 99487872 is 27878499.

99487872 is a `hidden beast` number, since 99 + 487 + 8 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (99487873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36708 + ... + 39324.

Almost surely, 2^99487872 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 99487872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160221600).

99487872 is an abundant number, since it is smaller than the sum of its proper divisors (220955328).

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

99487872 is a wasteful number, since it uses less digits than its factorization.

99487872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651 (or 2633 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 99487872 is about 9974.3607313953. The cubic root of 99487872 is about 463.3651643274.

The spelling of 99487872 in words is "ninety-nine million, four hundred eighty-seven thousand, eight hundred seventy-two".