28909426 has 16 divisors (see below), whose sum is σ = 53371584. Its totient is φ = 11436624.

The previous prime is 28909409. The next prime is 28909451. The reversal of 28909426 is 62490982.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79240 + ... + 79603.

It is an arithmetic number, because the mean of its divisors is an integer number (3335724).

Almost surely, 2^28909426 is an apocalyptic number.

28909426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28909426 is a deficient number, since it is larger than the sum of its proper divisors (24462158).

28909426 is a wasteful number, since it uses less digits than its factorization.

28909426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158865.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 28909426 is about 5376.7486457896. The cubic root of 28909426 is about 306.9114960956.

The spelling of 28909426 in words is "twenty-eight million, nine hundred nine thousand, four hundred twenty-six".