65229720 has 64 divisors (see below), whose sum is σ = 196391520. Its totient is φ = 17332224.

The previous prime is 65229719. The next prime is 65229727. The reversal of 65229720 is 2792256.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65229727) 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, 39634 + ... + 41246.

Almost surely, 2^65229720 is an apocalyptic number.

65229720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65229720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98195760).

65229720 is an abundant number, since it is smaller than the sum of its proper divisors (131161800).

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

65229720 is a wasteful number, since it uses less digits than its factorization.

65229720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964 (or 1960 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 65229720 is about 8076.4918126622. The cubic root of 65229720 is about 402.5456810671.

The spelling of 65229720 in words is "sixty-five million, two hundred twenty-nine thousand, seven hundred twenty".