28121926 has 8 divisors (see below), whose sum is σ = 48209040. Its totient is φ = 12052248.

The previous prime is 28121897. The next prime is 28121963. The reversal of 28121926 is 62912182.

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

It is a congruent number.

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, 1004341 + ... + 1004368.

It is an arithmetic number, because the mean of its divisors is an integer number (6026130).

Almost surely, 2^28121926 is an apocalyptic number.

28121926 is a deficient number, since it is larger than the sum of its proper divisors (20087114).

28121926 is a wasteful number, since it uses less digits than its factorization.

28121926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008718.

The product of its digits is 3456, while the sum is 31.

The square root of 28121926 is about 5303.0110314801. The cubic root of 28121926 is about 304.0990198556.

The spelling of 28121926 in words is "twenty-eight million, one hundred twenty-one thousand, nine hundred twenty-six".