99778010 has 32 divisors (see below), whose sum is σ = 184745232. Its totient is φ = 38776320.

The previous prime is 99777971. The next prime is 99778013. The reversal of 99778010 is 1087799.

It can be written as a sum of positive squares in 8 ways, for example, as 2380849 + 97397161 = 1543^2 + 9869^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (99778013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162464 + ... + 163076.

Almost surely, 2^99778010 is an apocalyptic number.

99778010 is a deficient number, since it is larger than the sum of its proper divisors (84967222).

99778010 is a wasteful number, since it uses less digits than its factorization.

99778010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 99778010 is about 9988.8943332083. The cubic root of 99778010 is about 463.8151667951.

The spelling of 99778010 in words is "ninety-nine million, seven hundred seventy-eight thousand, ten".