65008638 has 24 divisors (see below), whose sum is σ = 141722568. Its totient is φ = 21535632.

The previous prime is 65008627. The next prime is 65008681. The reversal of 65008638 is 83680056.

It is a super-2 number, since 2×65008638² = 8452246029230088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8145 + ... + 14012.

It is an arithmetic number, because the mean of its divisors is an integer number (5905107).

Almost surely, 2^65008638 is an apocalyptic number.

65008638 is an abundant number, since it is smaller than the sum of its proper divisors (76713930).

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

65008638 is a wasteful number, since it uses less digits than its factorization.

65008638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22328 (or 22325 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 65008638 is about 8062.7934365206. The cubic root of 65008638 is about 402.0903858541.

It can be divided in two parts, 6 and 5008638, that added together give a square (5008644 = 2238²).

The spelling of 65008638 in words is "sixty-five million, eight thousand, six hundred thirty-eight".