65140800 has 168 divisors, whose sum is σ = 219590112. Its totient is φ = 16896000.

The previous prime is 65140783. The next prime is 65140811. The reversal of 65140800 is 804156.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196635 + ... + 196965.

It is an arithmetic number, because the mean of its divisors is an integer number (1307084).

Almost surely, 2^65140800 is an apocalyptic number.

65140800 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 65140800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109795056).

65140800 is an abundant number, since it is smaller than the sum of its proper divisors (154449312).

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

65140800 is a wasteful number, since it uses less digits than its factorization.

65140800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 65140800 is about 8070.9850699899. The cubic root of 65140800 is about 402.3626835059.

Adding to 65140800 its reverse (804156), we get a palindrome (65944956).

The spelling of 65140800 in words is "sixty-five million, one hundred forty thousand, eight hundred".