26860861 has 4 divisors (see below), whose sum is σ = 27228892. Its totient is φ = 26492832.

The previous prime is 26860843. The next prime is 26860907. The reversal of 26860861 is 16806862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16806862 = 2 ⋅8403431.

It can be written as a sum of positive squares in 2 ways, for example, as 10304100 + 16556761 = 3210^2 + 4069^2 .

It is a cyclic number.

It is not a de Polignac number, because 26860861 - 2⁷ = 26860733 is a prime.

It is a super-2 number, since 2×26860861² = 1443011707322642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26860861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26860831) 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, 183906 + ... + 184051.

It is an arithmetic number, because the mean of its divisors is an integer number (6807223).

Almost surely, 2^26860861 is an apocalyptic number.

It is an amenable number.

26860861 is a deficient number, since it is larger than the sum of its proper divisors (368031).

26860861 is an equidigital number, since it uses as much as digits as its factorization.

26860861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368030.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 26860861 is about 5182.7464726726. The cubic root of 26860861 is about 299.4837826119.

The spelling of 26860861 in words is "twenty-six million, eight hundred sixty thousand, eight hundred sixty-one".