65244438 has 48 divisors (see below), whose sum is σ = 162279936. Its totient is φ = 18558000.

The previous prime is 65244409. The next prime is 65244451. The reversal of 65244438 is 83444256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30595 + ... + 32657.

It is an arithmetic number, because the mean of its divisors is an integer number (3380832).

Almost surely, 2^65244438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65244438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81139968).

65244438 is an abundant number, since it is smaller than the sum of its proper divisors (97035498).

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

65244438 is a wasteful number, since it uses less digits than its factorization.

65244438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329 (or 2326 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The square root of 65244438 is about 8077.4029242078. The cubic root of 65244438 is about 402.5759547000.

The spelling of 65244438 in words is "sixty-five million, two hundred forty-four thousand, four hundred thirty-eight".