26731540 has 24 divisors (see below), whose sum is σ = 61240032. Its totient is φ = 9720480.

The previous prime is 26731493. The next prime is 26731541. The reversal of 26731540 is 4513762.

It is a junction number, because it is equal to n+sod(n) for n = 26731499 and 26731508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26731541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60534 + ... + 60973.

It is an arithmetic number, because the mean of its divisors is an integer number (2551668).

Almost surely, 2^26731540 is an apocalyptic number.

26731540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26731540 is an abundant number, since it is smaller than the sum of its proper divisors (34508492).

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

26731540 is a wasteful number, since it uses less digits than its factorization.

26731540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121527 (or 121525 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 26731540 is about 5170.2553128448. The cubic root of 26731540 is about 299.0023899616.

The spelling of 26731540 in words is "twenty-six million, seven hundred thirty-one thousand, five hundred forty".