28912026 has 64 divisors (see below), whose sum is σ = 70189056. Its totient is φ = 7819200.

The previous prime is 28912007. The next prime is 28912031. The reversal of 28912026 is 62021982.

It is a junction number, because it is equal to n+sod(n) for n = 28911984 and 28912002.

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 31 ways as a sum of consecutive naturals, for example, 26055 + ... + 27141.

It is an arithmetic number, because the mean of its divisors is an integer number (1096704).

Almost surely, 2^28912026 is an apocalyptic number.

28912026 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28912026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35094528).

28912026 is an abundant number, since it is smaller than the sum of its proper divisors (41277030).

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

28912026 is a wasteful number, since it uses less digits than its factorization.

28912026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 28912026 is about 5376.9904221600. The cubic root of 28912026 is about 306.9206966239.

The spelling of 28912026 in words is "twenty-eight million, nine hundred twelve thousand, twenty-six".