64240000 has 160 divisors (see below), whose sum is σ = 176849640. Its totient is φ = 23040000.

The previous prime is 64239997. The next prime is 64240013. The reversal of 64240000 is 4246.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 879964 + ... + 880036.

Almost surely, 2^64240000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88424820).

64240000 is an abundant number, since it is smaller than the sum of its proper divisors (112609640).

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

64240000 is an equidigital number, since it uses as much as digits as its factorization.

64240000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 64240000 is about 8014.9859638056. The cubic root of 64240000 is about 400.4993762988.

Adding to 64240000 its reverse (4246), we get a palindrome (64244246).

The spelling of 64240000 in words is "sixty-four million, two hundred forty thousand".