26020640 has 24 divisors (see below), whose sum is σ = 61474140. Its totient is φ = 10408192.

The previous prime is 26020573. The next prime is 26020651. The reversal of 26020640 is 4602062.

It can be written as a sum of positive squares in 2 ways, for example, as 25361296 + 659344 = 5036^2 + 812^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 81155 + ... + 81474.

Almost surely, 2^26020640 is an apocalyptic number.

26020640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26020640 is an abundant number, since it is smaller than the sum of its proper divisors (35453500).

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

26020640 is a wasteful number, since it uses less digits than its factorization.

26020640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162644 (or 162636 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 26020640 is about 5101.0430305968. The cubic root of 26020640 is about 296.3279783098.

The spelling of 26020640 in words is "twenty-six million, twenty thousand, six hundred forty".