64198800 has 180 divisors, whose sum is σ = 236117700. Its totient is φ = 16097280.

The previous prime is 64198789. The next prime is 64198829. The reversal of 64198800 is 889146.

It is a happy number.

64198800 is a `hidden beast` number, since 641 + 9 + 8 + 8 + 0 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 3732624 + 60466176 = 1932^2 + 7776^2 .

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 60676 + ... + 61724.

It is an arithmetic number, because the mean of its divisors is an integer number (1311765).

Almost surely, 2^64198800 is an apocalyptic number.

64198800 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 64198800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118058850).

64198800 is an abundant number, since it is smaller than the sum of its proper divisors (171918900).

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

64198800 is a wasteful number, since it uses less digits than its factorization.

64198800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 64198800 is about 8012.4153661677. The cubic root of 64198800 is about 400.4137385701.

The spelling of 64198800 in words is "sixty-four million, one hundred ninety-eight thousand, eight hundred".