99998772 has 12 divisors (see below), whose sum is σ = 233330496. Its totient is φ = 33332920.

The previous prime is 99998749. The next prime is 99998783. The reversal of 99998772 is 27789999.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4166604 + ... + 4166627.

It is an arithmetic number, because the mean of its divisors is an integer number (19444208).

Almost surely, 2^99998772 is an apocalyptic number.

It is an amenable number.

99998772 is an abundant number, since it is smaller than the sum of its proper divisors (133331724).

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

99998772 is a wasteful number, since it uses less digits than its factorization.

99998772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8333238 (or 8333236 counting only the distinct ones).

The product of its digits is 5143824, while the sum is 60.

The square root of 99998772 is about 9999.9385998115. The cubic root of 99998772 is about 464.1569833965.

The spelling of 99998772 in words is "ninety-nine million, nine hundred ninety-eight thousand, seven hundred seventy-two".