99144920 has 64 divisors (see below), whose sum is σ = 255977280. Its totient is φ = 33854976.

The previous prime is 99144919. The next prime is 99144923. The reversal of 99144920 is 2944199.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99144923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88202 + ... + 89318.

It is an arithmetic number, because the mean of its divisors is an integer number (3999645).

Almost surely, 2^99144920 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 99144920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127988640).

99144920 is an abundant number, since it is smaller than the sum of its proper divisors (156832360).

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

99144920 is a wasteful number, since it uses less digits than its factorization.

99144920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452 (or 1448 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 99144920 is about 9957.1542119222. The cubic root of 99144920 is about 462.8321179160.

The spelling of 99144920 in words is "ninety-nine million, one hundred forty-four thousand, nine hundred twenty".