26123640 has 32 divisors (see below), whose sum is σ = 78371280. Its totient is φ = 6966272.

The previous prime is 26123639. The next prime is 26123659. The reversal of 26123640 is 4632162.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 26123640.

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, 108729 + ... + 108968.

Almost surely, 2^26123640 is an apocalyptic number.

26123640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26123640 is an abundant number, since it is smaller than the sum of its proper divisors (52247640).

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

26123640 is a wasteful number, since it uses less digits than its factorization.

26123640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217711 (or 217707 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 26123640 is about 5111.1290337850. The cubic root of 26123640 is about 296.7184580425.

The spelling of 26123640 in words is "twenty-six million, one hundred twenty-three thousand, six hundred forty".