26857540 has 12 divisors (see below), whose sum is σ = 56400876. Its totient is φ = 10743008.

The previous prime is 26857531. The next prime is 26857541. The reversal of 26857540 is 4575862.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10969344 + 15888196 = 3312^2 + 3986^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 26857540.

It is not an unprimeable number, because it can be changed into a prime (26857541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671419 + ... + 671458.

It is an arithmetic number, because the mean of its divisors is an integer number (4700073).

Almost surely, 2^26857540 is an apocalyptic number.

26857540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26857540 is an abundant number, since it is smaller than the sum of its proper divisors (29543336).

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

26857540 is a wasteful number, since it uses less digits than its factorization.

26857540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342886 (or 1342884 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 26857540 is about 5182.4260727964. The cubic root of 26857540 is about 299.4714396639.

The spelling of 26857540 in words is "twenty-six million, eight hundred fifty-seven thousand, five hundred forty".