26239920 has 80 divisors (see below), whose sum is σ = 92970240. Its totient is φ = 5997312.

The previous prime is 26239909. The next prime is 26239921. The reversal of 26239920 is 2993262.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (26239921) 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, 6130 + ... + 9489.

It is an arithmetic number, because the mean of its divisors is an integer number (1162128).

Almost surely, 2^26239920 is an apocalyptic number.

26239920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26239920 is an abundant number, since it is smaller than the sum of its proper divisors (66730320).

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

26239920 is a wasteful number, since it uses less digits than its factorization.

26239920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15642 (or 15636 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 26239920 is about 5122.4915812522. The cubic root of 26239920 is about 297.1580516674.

The spelling of 26239920 in words is "twenty-six million, two hundred thirty-nine thousand, nine hundred twenty".