99772008 has 64 divisors (see below), whose sum is σ = 285966720. Its totient is φ = 28416000.

The previous prime is 99772007. The next prime is 99772051. The reversal of 99772008 is 80027799.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (99772003) 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, 66628 + ... + 68108.

It is an arithmetic number, because the mean of its divisors is an integer number (4468230).

Almost surely, 2^99772008 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 99772008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142983360).

99772008 is an abundant number, since it is smaller than the sum of its proper divisors (186194712).

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

99772008 is a wasteful number, since it uses less digits than its factorization.

99772008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898 (or 1894 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 99772008 is about 9988.5938950385. The cubic root of 99772008 is about 463.8058665681.

The spelling of 99772008 in words is "ninety-nine million, seven hundred seventy-two thousand, eight".