99787776 has 88 divisors (see below), whose sum is σ = 290248224. Its totient is φ = 30228480.

The previous prime is 99787763. The next prime is 99787799. The reversal of 99787776 is 67778799.

It is a tau number, because it is divible by the number of its divisors (88).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32316 + ... + 35268.

Almost surely, 2^99787776 is an apocalyptic number.

99787776 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99787776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145124112).

99787776 is an abundant number, since it is smaller than the sum of its proper divisors (190460448).

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

99787776 is a wasteful number, since it uses less digits than its factorization.

99787776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2987 (or 2969 counting only the distinct ones).

The product of its digits is 9335088, while the sum is 60.

The square root of 99787776 is about 9989.3831641398. The cubic root of 99787776 is about 463.8302986234.

The spelling of 99787776 in words is "ninety-nine million, seven hundred eighty-seven thousand, seven hundred seventy-six".