26142540 has 24 divisors (see below), whose sum is σ = 73199280. Its totient is φ = 6971328.

The previous prime is 26142539. The next prime is 26142547. The reversal of 26142540 is 4524162.

It is a self number, because there is not a number n which added to its sum of digits gives 26142540.

It is not an unprimeable number, because it can be changed into a prime (26142547) 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, 217795 + ... + 217914.

It is an arithmetic number, because the mean of its divisors is an integer number (3049970).

Almost surely, 2^26142540 is an apocalyptic number.

26142540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26142540 is an abundant number, since it is smaller than the sum of its proper divisors (47056740).

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

26142540 is a wasteful number, since it uses less digits than its factorization.

26142540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435721 (or 435719 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 26142540 is about 5112.9776060531. The cubic root of 26142540 is about 296.7899976771.

The spelling of 26142540 in words is "twenty-six million, one hundred forty-two thousand, five hundred forty".