26145440 has 24 divisors (see below), whose sum is σ = 61768980. Its totient is φ = 10458112.

The previous prime is 26145433. The next prime is 26145451. The reversal of 26145440 is 4454162.

It can be written as a sum of positive squares in 2 ways, for example, as 23309584 + 2835856 = 4828^2 + 1684^2 .

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81545 + ... + 81864.

Almost surely, 2^26145440 is an apocalyptic number.

26145440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26145440 is an abundant number, since it is smaller than the sum of its proper divisors (35623540).

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

26145440 is a wasteful number, since it uses less digits than its factorization.

26145440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163424 (or 163416 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 26145440 is about 5113.2611902777. The cubic root of 26145440 is about 296.8009716065.

The spelling of 26145440 in words is "twenty-six million, one hundred forty-five thousand, four hundred forty".