26531240 has 16 divisors (see below), whose sum is σ = 59695380. Its totient is φ = 10612480.

The previous prime is 26531233. The next prime is 26531243. The reversal of 26531240 is 4213562.

It can be written as a sum of positive squares in 2 ways, for example, as 23990404 + 2540836 = 4898^2 + 1594^2 .

It is not an unprimeable number, because it can be changed into a prime (26531243) 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, 331601 + ... + 331680.

Almost surely, 2^26531240 is an apocalyptic number.

26531240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26531240 is an abundant number, since it is smaller than the sum of its proper divisors (33164140).

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

26531240 is a wasteful number, since it uses less digits than its factorization.

26531240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663292 (or 663288 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 26531240 is about 5150.8484737954. The cubic root of 26531240 is about 298.2537064382.

The spelling of 26531240 in words is "twenty-six million, five hundred thirty-one thousand, two hundred forty".