99778270 has 64 divisors (see below), whose sum is σ = 202409280. Its totient is φ = 35223552.

The previous prime is 99778267. The next prime is 99778271. The reversal of 99778270 is 7287799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99778271) 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 31 ways as a sum of consecutive naturals, for example, 182137 + ... + 182683.

It is an arithmetic number, because the mean of its divisors is an integer number (3162645).

Almost surely, 2^99778270 is an apocalyptic number.

99778270 is an abundant number, since it is smaller than the sum of its proper divisors (102631010).

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

99778270 is a wasteful number, since it uses less digits than its factorization.

99778270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637.

The product of its (nonzero) digits is 444528, while the sum is 49.

The square root of 99778270 is about 9988.9073476532. The cubic root of 99778270 is about 463.8155696623.

The spelling of 99778270 in words is "ninety-nine million, seven hundred seventy-eight thousand, two hundred seventy".