244690821 has 8 divisors (see below), whose sum is σ = 362504960. Its totient is φ = 163127196.

The previous prime is 244690811. The next prime is 244690841. The reversal of 244690821 is 128096442.

It is a de Polignac number, because none of the positive numbers 2^k-244690821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244690801) 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, 4531285 + ... + 4531338.

It is an arithmetic number, because the mean of its divisors is an integer number (45313120).

Almost surely, 2^244690821 is an apocalyptic number.

It is an amenable number.

244690821 is a deficient number, since it is larger than the sum of its proper divisors (117814139).

244690821 is an equidigital number, since it uses as much as digits as its factorization.

244690821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9062632 (or 9062626 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 244690821 is about 15642.5963637754. The cubic root of 244690821 is about 625.4691483383.

The spelling of 244690821 in words is "two hundred forty-four million, six hundred ninety thousand, eight hundred twenty-one".