99722780 has 12 divisors (see below), whose sum is σ = 209417880. Its totient is φ = 39889104.

The previous prime is 99722761. The next prime is 99722863. The reversal of 99722780 is 8722799.

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, 2493050 + ... + 2493089.

It is an arithmetic number, because the mean of its divisors is an integer number (17451490).

Almost surely, 2^99722780 is an apocalyptic number.

It is an amenable number.

99722780 is an abundant number, since it is smaller than the sum of its proper divisors (109695100).

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

99722780 is a wasteful number, since it uses less digits than its factorization.

99722780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4986148 (or 4986146 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 99722780 is about 9986.1293802955. The cubic root of 99722780 is about 463.7295726527.

The spelling of 99722780 in words is "ninety-nine million, seven hundred twenty-two thousand, seven hundred eighty".