26709440 has 112 divisors (see below), whose sum is σ = 70225920. Its totient is φ = 9630720.

The previous prime is 26709437. The next prime is 26709451. The reversal of 26709440 is 4490762.

It is a super-2 number, since 2×26709440² = 1426788370227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 26709397 and 26709406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139745 + ... + 139935.

Almost surely, 2^26709440 is an apocalyptic number.

26709440 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 26709440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35112960).

26709440 is an abundant number, since it is smaller than the sum of its proper divisors (43516480).

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

26709440 is a wasteful number, since it uses less digits than its factorization.

26709440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 26709440 is about 5168.1176457198. The cubic root of 26709440 is about 298.9199682895.

The spelling of 26709440 in words is "twenty-six million, seven hundred nine thousand, four hundred forty".