26490840 has 32 divisors (see below), whose sum is σ = 79472880. Its totient is φ = 7064192.

The previous prime is 26490817. The next prime is 26490847. The reversal of 26490840 is 4809462.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26490847) by changing a digit.

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, 110259 + ... + 110498.

Almost surely, 2^26490840 is an apocalyptic number.

26490840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26490840 is an abundant number, since it is smaller than the sum of its proper divisors (52982040).

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

26490840 is a wasteful number, since it uses less digits than its factorization.

26490840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220771 (or 220767 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 26490840 is about 5146.9252957470. The cubic root of 26490840 is about 298.1022425921.

The spelling of 26490840 in words is "twenty-six million, four hundred ninety thousand, eight hundred forty".