244290640 has 40 divisors (see below), whose sum is σ = 619612128. Its totient is φ = 88832640.

The previous prime is 244290637. The next prime is 244290647. The reversal of 244290640 is 46092442.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244290647) 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, 137922 + ... + 139681.

Almost surely, 2^244290640 is an apocalyptic number.

244290640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

244290640 is an abundant number, since it is smaller than the sum of its proper divisors (375321488).

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

244290640 is a wasteful number, since it uses less digits than its factorization.

244290640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277627 (or 277621 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 244290640 is about 15629.7997427990. The cubic root of 244290640 is about 625.1279865893.

The spelling of 244290640 in words is "two hundred forty-four million, two hundred ninety thousand, six hundred forty".