99779120 has 160 divisors (see below), whose sum is σ = 287981568. Its totient is φ = 31371264.

The previous prime is 99779081. The next prime is 99779131. The reversal of 99779120 is 2197799.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 447329 + ... + 447551.

Almost surely, 2^99779120 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 99779120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143990784).

99779120 is an abundant number, since it is smaller than the sum of its proper divisors (188202448).

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

99779120 is a wasteful number, since it uses less digits than its factorization.

99779120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 44.

The square root of 99779120 is about 9988.9498947587. The cubic root of 99779120 is about 463.8168867230.

It can be divided in two parts, 99779 and 120, that added together give a palindrome (99899).

The spelling of 99779120 in words is "ninety-nine million, seven hundred seventy-nine thousand, one hundred twenty".