99990026 has 16 divisors (see below), whose sum is σ = 151540200. Its totient is φ = 49479360.

The previous prime is 99990001. The next prime is 99990029. The reversal of 99990026 is 62009999.

It can be written as a sum of positive squares in 4 ways, for example, as 31348801 + 68641225 = 5599^2 + 8285^2 .

It is not an unprimeable number, because it can be changed into a prime (99990029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125060 + ... + 125856.

Almost surely, 2^99990026 is an apocalyptic number.

99990026 is a deficient number, since it is larger than the sum of its proper divisors (51550174).

99990026 is a wasteful number, since it uses less digits than its factorization.

99990026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 99990026 is about 9999.5012875643. The cubic root of 99990026 is about 464.1434511125.

The spelling of 99990026 in words is "ninety-nine million, nine hundred ninety thousand, twenty-six".