26497920 has 128 divisors (see below), whose sum is σ = 86977440. Its totient is φ = 6856704.

The previous prime is 26497873. The next prime is 26497921. The reversal of 26497920 is 2979462.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26497921) 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, 70854 + ... + 71226.

Almost surely, 2^26497920 is an apocalyptic number.

26497920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26497920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43488720).

26497920 is an abundant number, since it is smaller than the sum of its proper divisors (60479520).

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

26497920 is a wasteful number, since it uses less digits than its factorization.

26497920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 26497920 is about 5147.6130390697. The cubic root of 26497920 is about 298.1287973797.

The spelling of 26497920 in words is "twenty-six million, four hundred ninety-seven thousand, nine hundred twenty".