99860278 has 32 divisors (see below), whose sum is σ = 182115648. Its totient is φ = 40089600.

The previous prime is 99860263. The next prime is 99860279. The reversal of 99860278 is 87206899.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99860279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56488 + ... + 58228.

It is an arithmetic number, because the mean of its divisors is an integer number (5691114).

Almost surely, 2^99860278 is an apocalyptic number.

99860278 is a deficient number, since it is larger than the sum of its proper divisors (82255370).

99860278 is a wasteful number, since it uses less digits than its factorization.

99860278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 99860278 is about 9993.0114580140. The cubic root of 99860278 is about 463.9426052423.

The spelling of 99860278 in words is "ninety-nine million, eight hundred sixty thousand, two hundred seventy-eight".