26721140 has 12 divisors (see below), whose sum is σ = 56114436. Its totient is φ = 10688448.

The previous prime is 26721137. The next prime is 26721179. The reversal of 26721140 is 4112762.

It can be written as a sum of positive squares in 2 ways, for example, as 14915044 + 11806096 = 3862^2 + 3436^2 .

It is a congruent number.

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, 668009 + ... + 668048.

It is an arithmetic number, because the mean of its divisors is an integer number (4676203).

Almost surely, 2^26721140 is an apocalyptic number.

26721140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26721140 is an abundant number, since it is smaller than the sum of its proper divisors (29393296).

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

26721140 is a wasteful number, since it uses less digits than its factorization.

26721140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336066 (or 1336064 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 26721140 is about 5169.2494619625. The cubic root of 26721140 is about 298.9636089535.

The spelling of 26721140 in words is "twenty-six million, seven hundred twenty-one thousand, one hundred forty".