28911026 has 8 divisors (see below), whose sum is σ = 43390620. Its totient is φ = 14447488.

The previous prime is 28911019. The next prime is 28911031. The reversal of 28911026 is 62011982.

It can be written as a sum of positive squares in 2 ways, for example, as 23030401 + 5880625 = 4799^2 + 2425^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28911026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2810 + ... + 8106.

Almost surely, 2^28911026 is an apocalyptic number.

28911026 is a deficient number, since it is larger than the sum of its proper divisors (14479594).

28911026 is a wasteful number, since it uses less digits than its factorization.

28911026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8028.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 28911026 is about 5376.8974325349. The cubic root of 28911026 is about 306.9171580244.

The spelling of 28911026 in words is "twenty-eight million, nine hundred eleven thousand, twenty-six".