65404220 has 36 divisors (see below), whose sum is σ = 159775560. Its totient is φ = 22423968.

The previous prime is 65404189. The next prime is 65404301. The reversal of 65404220 is 2240456.

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, 32390 + ... + 34349.

It is an arithmetic number, because the mean of its divisors is an integer number (4438210).

Almost surely, 2^65404220 is an apocalyptic number.

It is an amenable number.

65404220 is an abundant number, since it is smaller than the sum of its proper divisors (94371340).

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

65404220 is a wasteful number, since it uses less digits than its factorization.

65404220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66762 (or 66753 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 65404220 is about 8087.2875551695. The cubic root of 65404220 is about 402.9043196145.

Adding to 65404220 its reverse (2240456), we get a palindrome (67644676).

The spelling of 65404220 in words is "sixty-five million, four hundred four thousand, two hundred twenty".