26440398 has 32 divisors (see below), whose sum is σ = 58924800. Its totient is φ = 8788248.

The previous prime is 26440391. The next prime is 26440429. The reversal of 26440398 is 89304462.

It is a happy number.

26440398 is a `hidden beast` number, since 2 + 644 + 0 + 3 + 9 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26440391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35215 + ... + 35957.

It is an arithmetic number, because the mean of its divisors is an integer number (1841400).

Almost surely, 2^26440398 is an apocalyptic number.

26440398 is an abundant number, since it is smaller than the sum of its proper divisors (32484402).

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

26440398 is a wasteful number, since it uses less digits than its factorization.

26440398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413 (or 1407 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 26440398 is about 5142.0227537420. The cubic root of 26440398 is about 297.9129139099.

The spelling of 26440398 in words is "twenty-six million, four hundred forty thousand, three hundred ninety-eight".