26317920 has 48 divisors (see below), whose sum is σ = 82902960. Its totient is φ = 7017984.

The previous prime is 26317919. The next prime is 26317939. The reversal of 26317920 is 2971362.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 26935 + ... + 27894.

It is an arithmetic number, because the mean of its divisors is an integer number (1727145).

Almost surely, 2^26317920 is an apocalyptic number.

26317920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26317920 is an abundant number, since it is smaller than the sum of its proper divisors (56585040).

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

26317920 is a wasteful number, since it uses less digits than its factorization.

26317920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54847 (or 54839 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 26317920 is about 5130.0994142414. The cubic root of 26317920 is about 297.4522014397.

The spelling of 26317920 in words is "twenty-six million, three hundred seventeen thousand, nine hundred twenty".