26857440 has 96 divisors (see below), whose sum is σ = 94016160. Its totient is φ = 7160832.

The previous prime is 26857429. The next prime is 26857459. The reversal of 26857440 is 4475862.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 26857395 and 26857404.

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, 1212 + ... + 7428.

It is an arithmetic number, because the mean of its divisors is an integer number (979335).

Almost surely, 2^26857440 is an apocalyptic number.

26857440 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 26857440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47008080).

26857440 is an abundant number, since it is smaller than the sum of its proper divisors (67158720).

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

26857440 is a wasteful number, since it uses less digits than its factorization.

26857440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6241 (or 6227 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 26857440 is about 5182.4164247964. The cubic root of 26857440 is about 299.4710679845.

The spelling of 26857440 in words is "twenty-six million, eight hundred fifty-seven thousand, four hundred forty".