99996780 has 48 divisors (see below), whose sum is σ = 301531104. Its totient is φ = 24614400.

The previous prime is 99996779. The next prime is 99996797. The reversal of 99996780 is 8769999.

It is a self number, because there is not a number n which added to its sum of digits gives 99996780.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63321 + ... + 64880.

It is an arithmetic number, because the mean of its divisors is an integer number (6281898).

Almost surely, 2^99996780 is an apocalyptic number.

It is an amenable number.

99996780 is an abundant number, since it is smaller than the sum of its proper divisors (201534324).

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

99996780 is a wasteful number, since it uses less digits than its factorization.

99996780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128226 (or 128224 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 57.

The square root of 99996780 is about 9999.8389987039. The cubic root of 99996780 is about 464.1539013358.

It can be divided in two parts, 999 and 96780, that added together give a palindrome (97779).

The spelling of 99996780 in words is "ninety-nine million, nine hundred ninety-six thousand, seven hundred eighty".