99722490 has 64 divisors (see below), whose sum is σ = 277032960. Its totient is φ = 22501440.

The previous prime is 99722489. The next prime is 99722509. The reversal of 99722490 is 9422799.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13585 + ... + 19595.

It is an arithmetic number, because the mean of its divisors is an integer number (4328640).

Almost surely, 2^99722490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99722490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138516480).

99722490 is an abundant number, since it is smaller than the sum of its proper divisors (177310470).

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

99722490 is a wasteful number, since it uses less digits than its factorization.

99722490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6107.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 99722490 is about 9986.1148601446. The cubic root of 99722490 is about 463.7291231342.

The spelling of 99722490 in words is "ninety-nine million, seven hundred twenty-two thousand, four hundred ninety".