65129372 has 48 divisors (see below), whose sum is σ = 143549952. Its totient is φ = 25116480.

The previous prime is 65129371. The next prime is 65129381. The reversal of 65129372 is 27392156.

It is a super-2 number, since 2×65129372² = 8483670194228768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65129371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30698 + ... + 32750.

It is an arithmetic number, because the mean of its divisors is an integer number (2990624).

Almost surely, 2^65129372 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65129372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71774976).

65129372 is an abundant number, since it is smaller than the sum of its proper divisors (78420580).

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

65129372 is a wasteful number, since it uses less digits than its factorization.

65129372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178 (or 2176 counting only the distinct ones).

The product of its digits is 22680, while the sum is 35.

The square root of 65129372 is about 8070.2770708322. The cubic root of 65129372 is about 402.3391525818.

The spelling of 65129372 in words is "sixty-five million, one hundred twenty-nine thousand, three hundred seventy-two".