26872820 has 24 divisors (see below), whose sum is σ = 60774504. Its totient is φ = 9922176.

The previous prime is 26872817. The next prime is 26872837. The reversal of 26872820 is 2827862.

It can be written as a sum of positive squares in 4 ways, for example, as 2390116 + 24482704 = 1546^2 + 4948^2 .

It is a congruent number.

It is an unprimeable number.

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, 51419 + ... + 51938.

It is an arithmetic number, because the mean of its divisors is an integer number (2532271).

Almost surely, 2^26872820 is an apocalyptic number.

26872820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26872820 is an abundant number, since it is smaller than the sum of its proper divisors (33901684).

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

26872820 is a wasteful number, since it uses less digits than its factorization.

26872820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103379 (or 103377 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 26872820 is about 5183.9000761975. The cubic root of 26872820 is about 299.5282214352.

The spelling of 26872820 in words is "twenty-six million, eight hundred seventy-two thousand, eight hundred twenty".