26857890 has 48 divisors (see below), whose sum is σ = 70090488. Its totient is φ = 7135488.

The previous prime is 26857871. The next prime is 26857903. The reversal of 26857890 is 9875862.

It can be written as a sum of positive squares in 4 ways, for example, as 22781529 + 4076361 = 4773^2 + 2019^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40804 + ... + 41456.

Almost surely, 2^26857890 is an apocalyptic number.

26857890 is an abundant number, since it is smaller than the sum of its proper divisors (43232598).

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

26857890 is a wasteful number, since it uses less digits than its factorization.

26857890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 26857890 is about 5182.4598406548. The cubic root of 26857890 is about 299.4727405344.

The spelling of 26857890 in words is "twenty-six million, eight hundred fifty-seven thousand, eight hundred ninety".