65253720 has 128 divisors (see below), whose sum is σ = 225815040. Its totient is φ = 14776320.

The previous prime is 65253707. The next prime is 65253761. The reversal of 65253720 is 2735256.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109744 + ... + 110336.

It is an arithmetic number, because the mean of its divisors is an integer number (1764180).

Almost surely, 2^65253720 is an apocalyptic number.

65253720 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 65253720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112907520).

65253720 is an abundant number, since it is smaller than the sum of its proper divisors (160561320).

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

65253720 is a wasteful number, since it uses less digits than its factorization.

65253720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 65253720 is about 8077.9774696393. The cubic root of 65253720 is about 402.5950446175.

Adding to 65253720 its reverse (2735256), we get a palindrome (67988976).

The spelling of 65253720 in words is "sixty-five million, two hundred fifty-three thousand, seven hundred twenty".