26722440 has 128 divisors (see below), whose sum is σ = 90288000. Its totient is φ = 7029504.

The previous prime is 26722429. The next prime is 26722463. The reversal of 26722440 is 4422762.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117607 + ... + 117833.

It is an arithmetic number, because the mean of its divisors is an integer number (705375).

Almost surely, 2^26722440 is an apocalyptic number.

26722440 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 26722440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45144000).

26722440 is an abundant number, since it is smaller than the sum of its proper divisors (63565560).

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

26722440 is a wasteful number, since it uses less digits than its factorization.

26722440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 26722440 is about 5169.3752040261. The cubic root of 26722440 is about 298.9684571297.

The spelling of 26722440 in words is "twenty-six million, seven hundred twenty-two thousand, four hundred forty".