65433540 has 96 divisors (see below), whose sum is σ = 190963584. Its totient is φ = 16727040.

The previous prime is 65433539. The next prime is 65433553. The reversal of 65433540 is 4533456.

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 = 65433498 and 65433507.

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, 164622 + ... + 165018.

It is an arithmetic number, because the mean of its divisors is an integer number (1989204).

Almost surely, 2^65433540 is an apocalyptic number.

65433540 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 65433540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95481792).

65433540 is an abundant number, since it is smaller than the sum of its proper divisors (125530044).

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

65433540 is a wasteful number, since it uses less digits than its factorization.

65433540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 65433540 is about 8089.1000735558. The cubic root of 65433540 is about 402.9645164940.

Adding to 65433540 its reverse (4533456), we get a palindrome (69966996).

The spelling of 65433540 in words is "sixty-five million, four hundred thirty-three thousand, five hundred forty".