65338440 has 32 divisors (see below), whose sum is σ = 196015680. Its totient is φ = 17423552.

The previous prime is 65338439. The next prime is 65338459. The reversal of 65338440 is 4483356.

It is a super-2 number, since 2×65338440² = 8538223483267200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272124 + ... + 272363.

It is an arithmetic number, because the mean of its divisors is an integer number (6125490).

Almost surely, 2^65338440 is an apocalyptic number.

65338440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65338440 is an abundant number, since it is smaller than the sum of its proper divisors (130677240).

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

65338440 is a wasteful number, since it uses less digits than its factorization.

65338440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544501 (or 544497 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 65338440 is about 8083.2196555580. The cubic root of 65338440 is about 402.7692012372.

It can be divided in two parts, 653 and 38440, that added together give a palindrome (39093).

The spelling of 65338440 in words is "sixty-five million, three hundred thirty-eight thousand, four hundred forty".