26278464 has 112 divisors (see below), whose sum is σ = 75273408. Its totient is φ = 8060928.

The previous prime is 26278457. The next prime is 26278477. The reversal of 26278464 is 46487262.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270864 + ... + 270960.

It is an arithmetic number, because the mean of its divisors is an integer number (672084).

Almost surely, 2^26278464 is an apocalyptic number.

26278464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26278464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37636704).

26278464 is an abundant number, since it is smaller than the sum of its proper divisors (48994944).

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

26278464 is a wasteful number, since it uses less digits than its factorization.

26278464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 202 counting only the distinct ones).

The product of its digits is 129024, while the sum is 39.

The square root of 26278464 is about 5126.2524323330. The cubic root of 26278464 is about 297.3034796564.

The spelling of 26278464 in words is "twenty-six million, two hundred seventy-eight thousand, four hundred sixty-four".