26831890 has 16 divisors (see below), whose sum is σ = 48589632. Its totient is φ = 10667824.

The previous prime is 26831879. The next prime is 26831891. The reversal of 26831890 is 9813862.

It is not an unprimeable number, because it can be changed into a prime (26831891) 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, 6364 + ... + 9703.

It is an arithmetic number, because the mean of its divisors is an integer number (3036852).

Almost surely, 2^26831890 is an apocalyptic number.

26831890 is a deficient number, since it is larger than the sum of its proper divisors (21757742).

26831890 is a wasteful number, since it uses less digits than its factorization.

26831890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16241.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 26831890 is about 5179.9507719669. The cubic root of 26831890 is about 299.3760736563.

The spelling of 26831890 in words is "twenty-six million, eight hundred thirty-one thousand, eight hundred ninety".