26398860 has 24 divisors (see below), whose sum is σ = 73916976. Its totient is φ = 7039680.

The previous prime is 26398849. The next prime is 26398873. The reversal of 26398860 is 6889362.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219931 + ... + 220050.

It is an arithmetic number, because the mean of its divisors is an integer number (3079874).

Almost surely, 2^26398860 is an apocalyptic number.

26398860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26398860 is an abundant number, since it is smaller than the sum of its proper divisors (47518116).

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

26398860 is a wasteful number, since it uses less digits than its factorization.

26398860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439993 (or 439991 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 26398860 is about 5137.9820941689. The cubic root of 26398860 is about 297.7568245737.

The spelling of 26398860 in words is "twenty-six million, three hundred ninety-eight thousand, eight hundred sixty".