65400000 has 168 divisors, whose sum is σ = 218267280. Its totient is φ = 17280000.

The previous prime is 65399989. The next prime is 65400007. The reversal of 65400000 is 456.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65400007) 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, 599946 + ... + 600054.

It is an arithmetic number, because the mean of its divisors is an integer number (1299210).

Almost surely, 2^65400000 is an apocalyptic number.

65400000 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 65400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109133640).

65400000 is an abundant number, since it is smaller than the sum of its proper divisors (152867280).

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

65400000 is an equidigital number, since it uses as much as digits as its factorization.

65400000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 65400000 is about 8087.0266476623. The cubic root of 65400000 is about 402.8956540533.

Adding to 65400000 its reverse (456), we get a palindrome (65400456).

It can be divided in two parts, 65 and 400000, that added together give a triangular number (400065 = T₈₉₄).

The spelling of 65400000 in words is "sixty-five million, four hundred thousand".