26867840 has 32 divisors (see below), whose sum is σ = 64232460. Its totient is φ = 10746880.

The previous prime is 26867831. The next prime is 26867849. The reversal of 26867840 is 4876862.

It is an interprime number because it is at equal distance from previous prime (26867831) and next prime (26867849).

It can be written as a sum of positive squares in 2 ways, for example, as 22963264 + 3904576 = 4792^2 + 1976^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (26867849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20351 + ... + 21630.

Almost surely, 2^26867840 is an apocalyptic number.

26867840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26867840 is an abundant number, since it is smaller than the sum of its proper divisors (37364620).

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

26867840 is an equidigital number, since it uses as much as digits as its factorization.

26867840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42000 (or 41988 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 26867840 is about 5183.4197206092. The cubic root of 26867840 is about 299.5097176992.

The spelling of 26867840 in words is "twenty-six million, eight hundred sixty-seven thousand, eight hundred forty".