99242780 has 96 divisors (see below), whose sum is σ = 264929280. Its totient is φ = 30378240.

The previous prime is 99242711. The next prime is 99242783. The reversal of 99242780 is 8724299.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99242783) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55541 + ... + 57299.

It is an arithmetic number, because the mean of its divisors is an integer number (2759680).

Almost surely, 2^99242780 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 99242780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132464640).

99242780 is an abundant number, since it is smaller than the sum of its proper divisors (165686500).

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

99242780 is a wasteful number, since it uses less digits than its factorization.

99242780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819 (or 1817 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 99242780 is about 9962.0670545826. The cubic root of 99242780 is about 462.9843457770.

The spelling of 99242780 in words is "ninety-nine million, two hundred forty-two thousand, seven hundred eighty".