99142788 has 48 divisors (see below), whose sum is σ = 244500480. Its totient is φ = 31203744.

The previous prime is 99142777. The next prime is 99142789. The reversal of 99142788 is 88724199.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (99142789) 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, 19531 + ... + 24077.

It is an arithmetic number, because the mean of its divisors is an integer number (5093760).

Almost surely, 2^99142788 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 99142788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122250240).

99142788 is an abundant number, since it is smaller than the sum of its proper divisors (145357692).

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

99142788 is a wasteful number, since it uses less digits than its factorization.

99142788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4656 (or 4654 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 99142788 is about 9957.0471526452. The cubic root of 99142788 is about 462.8288003308.

The spelling of 99142788 in words is "ninety-nine million, one hundred forty-two thousand, seven hundred eighty-eight".