26928021 has 16 divisors (see below), whose sum is σ = 37296000. Its totient is φ = 17268480.

The previous prime is 26927993. The next prime is 26928029. The reversal of 26928021 is 12082962.

It is not a de Polignac number, because 26928021 - 2⁷ = 26927893 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 26928021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26928029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7480 + ... + 10478.

It is an arithmetic number, because the mean of its divisors is an integer number (2331000).

Almost surely, 2^26928021 is an apocalyptic number.

It is an amenable number.

26928021 is a deficient number, since it is larger than the sum of its proper divisors (10367979).

26928021 is a wasteful number, since it uses less digits than its factorization.

26928021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116.

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

The square root of 26928021 is about 5189.2216179308. The cubic root of 26928021 is about 299.7331738608.

The spelling of 26928021 in words is "twenty-six million, nine hundred twenty-eight thousand, twenty-one".