26004640 has 24 divisors (see below), whose sum is σ = 61436340. Its totient is φ = 10401792.

The previous prime is 26004631. The next prime is 26004653. The reversal of 26004640 is 4640062.

It can be written as a sum of positive squares in 2 ways, for example, as 25928464 + 76176 = 5092^2 + 276^2 .

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, 81105 + ... + 81424.

Almost surely, 2^26004640 is an apocalyptic number.

26004640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26004640 is an abundant number, since it is smaller than the sum of its proper divisors (35431700).

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

26004640 is a wasteful number, since it uses less digits than its factorization.

26004640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162544 (or 162536 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 26004640 is about 5099.4744827286. The cubic root of 26004640 is about 296.2672288460.

The spelling of 26004640 in words is "twenty-six million, four thousand, six hundred forty".