26321840 has 40 divisors (see below), whose sum is σ = 64422960. Its totient is φ = 9974016.

The previous prime is 26321809. The next prime is 26321843. The reversal of 26321840 is 4812362.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (26321843) 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 7 ways as a sum of consecutive naturals, for example, 7139 + ... + 10178.

It is an arithmetic number, because the mean of its divisors is an integer number (1610574).

Almost surely, 2^26321840 is an apocalyptic number.

26321840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26321840 is an abundant number, since it is smaller than the sum of its proper divisors (38101120).

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

26321840 is a wasteful number, since it uses less digits than its factorization.

26321840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17349 (or 17343 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 26321840 is about 5130.4814588886. The cubic root of 26321840 is about 297.4669690042.

The spelling of 26321840 in words is "twenty-six million, three hundred twenty-one thousand, eight hundred forty".