26461640 has 16 divisors (see below), whose sum is σ = 59538780. Its totient is φ = 10584640.

The previous prime is 26461619. The next prime is 26461649. The reversal of 26461640 is 4616462.

It can be written as a sum of positive squares in 2 ways, for example, as 26357956 + 103684 = 5134^2 + 322^2 .

It is not an unprimeable number, because it can be changed into a prime (26461649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330731 + ... + 330810.

Almost surely, 2^26461640 is an apocalyptic number.

26461640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26461640 is an abundant number, since it is smaller than the sum of its proper divisors (33077140).

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

26461640 is a wasteful number, since it uses less digits than its factorization.

26461640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661552 (or 661548 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 26461640 is about 5144.0878686119. The cubic root of 26461640 is about 297.9926728226.

The spelling of 26461640 in words is "twenty-six million, four hundred sixty-one thousand, six hundred forty".