26401580 has 24 divisors (see below), whose sum is σ = 55556592. Its totient is φ = 10539072.

The previous prime is 26401567. The next prime is 26401589. The reversal of 26401580 is 8510462.

It is not an unprimeable number, because it can be changed into a prime (26401589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11834 + ... + 13886.

It is an arithmetic number, because the mean of its divisors is an integer number (2314858).

Almost surely, 2^26401580 is an apocalyptic number.

26401580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26401580 is an abundant number, since it is smaller than the sum of its proper divisors (29155012).

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

26401580 is a wasteful number, since it uses less digits than its factorization.

26401580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2705 (or 2703 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 26401580 is about 5138.2467827071. The cubic root of 26401580 is about 297.7670506560.

The spelling of 26401580 in words is "twenty-six million, four hundred one thousand, five hundred eighty".