26242640 has 40 divisors (see below), whose sum is σ = 61329408. Its totient is φ = 10442880.

The previous prime is 26242639. The next prime is 26242681. The reversal of 26242640 is 4624262.

It is a tau number, because it is divible by the number of its divisors (40).

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, 17105 + ... + 18575.

Almost surely, 2^26242640 is an apocalyptic number.

26242640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26242640 is an abundant number, since it is smaller than the sum of its proper divisors (35086768).

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

26242640 is a wasteful number, since it uses less digits than its factorization.

26242640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707 (or 1701 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 26242640 is about 5122.7570701723. The cubic root of 26242640 is about 297.1683190002.

The spelling of 26242640 in words is "twenty-six million, two hundred forty-two thousand, six hundred forty".