65207538 has 64 divisors (see below), whose sum is σ = 159344640. Its totient is φ = 19602000.

The previous prime is 65207533. The next prime is 65207551. The reversal of 65207538 is 83570256.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (65207533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89331 + ... + 90057.

It is an arithmetic number, because the mean of its divisors is an integer number (2489760).

Almost surely, 2^65207538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65207538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79672320).

65207538 is an abundant number, since it is smaller than the sum of its proper divisors (94137102).

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

65207538 is a wasteful number, since it uses less digits than its factorization.

65207538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900 (or 894 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 65207538 is about 8075.1184511436. The cubic root of 65207538 is about 402.5000460373.

The spelling of 65207538 in words is "sixty-five million, two hundred seven thousand, five hundred thirty-eight".