65081400 has 96 divisors (see below), whose sum is σ = 208320000. Its totient is φ = 16790400.

The previous prime is 65081383. The next prime is 65081407. The reversal of 65081400 is 418056.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65081407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16851 + ... + 20349.

It is an arithmetic number, because the mean of its divisors is an integer number (2170000).

Almost surely, 2^65081400 is an apocalyptic number.

65081400 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 65081400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104160000).

65081400 is an abundant number, since it is smaller than the sum of its proper divisors (143238600).

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

65081400 is a wasteful number, since it uses less digits than its factorization.

65081400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3549 (or 3540 counting only the distinct ones).

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

The square root of 65081400 is about 8067.3043825060. The cubic root of 65081400 is about 402.2403453719.

Adding to 65081400 its reverse (418056), we get a palindrome (65499456).

The spelling of 65081400 in words is "sixty-five million, eighty-one thousand, four hundred".