99879760 has 60 divisors (see below), whose sum is σ = 246791124. Its totient is φ = 37463040.

The previous prime is 99879757. The next prime is 99879763. The reversal of 99879760 is 6797899.

It is an interprime number because it is at equal distance from previous prime (99879757) and next prime (99879763).

It can be written as a sum of positive squares in 2 ways, for example, as 57577744 + 42302016 = 7588^2 + 6504^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99879763) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 368425 + ... + 368695.

Almost surely, 2^99879760 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 99879760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123395562).

99879760 is an abundant number, since it is smaller than the sum of its proper divisors (146911364).

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

99879760 is a wasteful number, since it uses less digits than its factorization.

99879760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 55.

The square root of 99879760 is about 9993.9861917055. The cubic root of 99879760 is about 463.9727738682.

The spelling of 99879760 in words is "ninety-nine million, eight hundred seventy-nine thousand, seven hundred sixty".