26217920 has 28 divisors (see below), whose sum is σ = 62432184. Its totient is φ = 10487040.

The previous prime is 26217913. The next prime is 26217923. The reversal of 26217920 is 2971262.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26217923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40646 + ... + 41285.

Almost surely, 2^26217920 is an apocalyptic number.

26217920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26217920 is an abundant number, since it is smaller than the sum of its proper divisors (36214264).

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

26217920 is an equidigital number, since it uses as much as digits as its factorization.

26217920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81948 (or 81938 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 26217920 is about 5120.3437384613. The cubic root of 26217920 is about 297.0749809741.

The spelling of 26217920 in words is "twenty-six million, two hundred seventeen thousand, nine hundred twenty".