99878084 has 12 divisors (see below), whose sum is σ = 175238700. Its totient is φ = 49809888.

The previous prime is 99878083. The next prime is 99878099. The reversal of 99878084 is 48087899.

It can be written as a sum of positive squares in 2 ways, for example, as 45265984 + 54612100 = 6728^2 + 7390^2 .

It is a super-2 number, since 2×99878084² = 19951263327022112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99878083) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 30539 + ... + 33650.

It is an arithmetic number, because the mean of its divisors is an integer number (14603225).

Almost surely, 2^99878084 is an apocalyptic number.

It is an amenable number.

99878084 is a deficient number, since it is larger than the sum of its proper divisors (75360616).

99878084 is a wasteful number, since it uses less digits than its factorization.

99878084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64582 (or 64580 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 53.

The square root of 99878084 is about 9993.9023409277. The cubic root of 99878084 is about 463.9701786720.

The spelling of 99878084 in words is "ninety-nine million, eight hundred seventy-eight thousand, eighty-four".