99912798 has 32 divisors (see below), whose sum is σ = 222405120. Its totient is φ = 33247800.

The previous prime is 99912797. The next prime is 99912803. The reversal of 99912798 is 89721999.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99912797) 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, 41323 + ... + 43673.

It is an arithmetic number, because the mean of its divisors is an integer number (6950160).

Almost surely, 2^99912798 is an apocalyptic number.

99912798 is an abundant number, since it is smaller than the sum of its proper divisors (122492322).

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

99912798 is a wasteful number, since it uses less digits than its factorization.

99912798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3149 (or 3143 counting only the distinct ones).

The product of its digits is 734832, while the sum is 54.

The square root of 99912798 is about 9995.6389490617. The cubic root of 99912798 is about 464.0239255152.

The spelling of 99912798 in words is "ninety-nine million, nine hundred twelve thousand, seven hundred ninety-eight".