99651390 has 64 divisors (see below), whose sum is σ = 255052800. Its totient is φ = 24845184.

The previous prime is 99651379. The next prime is 99651403. The reversal of 99651390 is 9315699.

It is a congruent number.

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, 43924 + ... + 46136.

It is an arithmetic number, because the mean of its divisors is an integer number (3985200).

Almost surely, 2^99651390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99651390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127526400).

99651390 is an abundant number, since it is smaller than the sum of its proper divisors (155401410).

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

99651390 is a wasteful number, since it uses less digits than its factorization.

99651390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321.

The product of its (nonzero) digits is 65610, while the sum is 42.

The square root of 99651390 is about 9982.5542823468. The cubic root of 99651390 is about 463.6188872864.

The spelling of 99651390 in words is "ninety-nine million, six hundred fifty-one thousand, three hundred ninety".