26026640 has 20 divisors (see below), whose sum is σ = 60512124. Its totient is φ = 10410624.

The previous prime is 26026603. The next prime is 26026667. The reversal of 26026640 is 4662062.

It can be written as a sum of positive squares in 2 ways, for example, as 18386944 + 7639696 = 4288^2 + 2764^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

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, 162587 + ... + 162746.

Almost surely, 2^26026640 is an apocalyptic number.

26026640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26026640 is an abundant number, since it is smaller than the sum of its proper divisors (34485484).

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

26026640 is a wasteful number, since it uses less digits than its factorization.

26026640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325346 (or 325340 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 26026640 is about 5101.6311117132. The cubic root of 26026640 is about 296.3507529383.

The spelling of 26026640 in words is "twenty-six million, twenty-six thousand, six hundred forty".