26828840 has 32 divisors (see below), whose sum is σ = 60729480. Its totient is φ = 10666752.

The previous prime is 26828819. The next prime is 26828849. The reversal of 26828840 is 4882862.

26828840 = T₂₅ + T₂₆ + ... + T₅₄₃.

It can be written as a sum of positive squares in 4 ways, for example, as 23639044 + 3189796 = 4862^2 + 1786^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26828794 and 26828803.

It is not an unprimeable number, because it can be changed into a prime (26828849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4982 + ... + 8858.

Almost surely, 2^26828840 is an apocalyptic number.

26828840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26828840 is an abundant number, since it is smaller than the sum of its proper divisors (33900640).

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

26828840 is a wasteful number, since it uses less digits than its factorization.

26828840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4061 (or 4057 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 38.

The square root of 26828840 is about 5179.6563592578. The cubic root of 26828840 is about 299.3647297962.

The spelling of 26828840 in words is "twenty-six million, eight hundred twenty-eight thousand, eight hundred forty".