65143740 has 96 divisors (see below), whose sum is σ = 187971840. Its totient is φ = 16851456.

The previous prime is 65143733. The next prime is 65143759. The reversal of 65143740 is 4734156.

65143740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×65143740² = 8487413722375200, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 65143698 and 65143707.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 468591 + ... + 468729.

It is an arithmetic number, because the mean of its divisors is an integer number (1958040).

Almost surely, 2^65143740 is an apocalyptic number.

65143740 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 65143740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93985920).

65143740 is an abundant number, since it is smaller than the sum of its proper divisors (122828100).

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

65143740 is a wasteful number, since it uses less digits than its factorization.

65143740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 65143740 is about 8071.1672018364. The cubic root of 65143740 is about 402.3687366937.

Adding to 65143740 its reverse (4734156), we get a palindrome (69877896).

The spelling of 65143740 in words is "sixty-five million, one hundred forty-three thousand, seven hundred forty".