26221340 has 12 divisors (see below), whose sum is σ = 55064856. Its totient is φ = 10488528.

The previous prime is 26221339. The next prime is 26221369. The reversal of 26221340 is 4312262.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1311067 = 26221340 / (2 + 6 + 2 + 2 + 1 + 3 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655514 + ... + 655553.

It is an arithmetic number, because the mean of its divisors is an integer number (4588738).

Almost surely, 2^26221340 is an apocalyptic number.

26221340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26221340 is an abundant number, since it is smaller than the sum of its proper divisors (28843516).

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

26221340 is a wasteful number, since it uses less digits than its factorization.

26221340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311076 (or 1311074 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 26221340 is about 5120.6776895251. The cubic root of 26221340 is about 297.0878977408.

The spelling of 26221340 in words is "twenty-six million, two hundred twenty-one thousand, three hundred forty".