26505440 has 48 divisors (see below), whose sum is σ = 67441248. Its totient is φ = 9785856.

The previous prime is 26505433. The next prime is 26505463. The reversal of 26505440 is 4450562.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

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, 4292 + ... + 8451.

It is an arithmetic number, because the mean of its divisors is an integer number (1405026).

Almost surely, 2^26505440 is an apocalyptic number.

26505440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26505440 is an abundant number, since it is smaller than the sum of its proper divisors (40935808).

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

26505440 is a wasteful number, since it uses less digits than its factorization.

26505440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12771 (or 12763 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 26505440 is about 5148.3434228886. The cubic root of 26505440 is about 298.1569972850.

The spelling of 26505440 in words is "twenty-six million, five hundred five thousand, four hundred forty".