65229920 has 96 divisors (see below), whose sum is σ = 177811200. Its totient is φ = 22150656.

The previous prime is 65229919. The next prime is 65229973. The reversal of 65229920 is 2992256.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155471 + ... + 155889.

It is an arithmetic number, because the mean of its divisors is an integer number (1852200).

Almost surely, 2^65229920 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 65229920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88905600).

65229920 is an abundant number, since it is smaller than the sum of its proper divisors (112581280).

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

65229920 is a wasteful number, since it uses less digits than its factorization.

65229920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 65229920 is about 8076.5041942662. The cubic root of 65229920 is about 402.5460924801.

The spelling of 65229920 in words is "sixty-five million, two hundred twenty-nine thousand, nine hundred twenty".