26515540 has 24 divisors (see below), whose sum is σ = 57480192. Its totient is φ = 10263840.

The previous prime is 26515513. The next prime is 26515553. The reversal of 26515540 is 4551562.

It is a super-2 number, since 2×26515540² = 1406147722983200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26515499 and 26515508.

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, 20764 + ... + 22003.

It is an arithmetic number, because the mean of its divisors is an integer number (2395008).

Almost surely, 2^26515540 is an apocalyptic number.

26515540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26515540 is an abundant number, since it is smaller than the sum of its proper divisors (30964652).

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

26515540 is a wasteful number, since it uses less digits than its factorization.

26515540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42807 (or 42805 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 26515540 is about 5149.3242275079. The cubic root of 26515540 is about 298.1948637664.

The spelling of 26515540 in words is "twenty-six million, five hundred fifteen thousand, five hundred forty".