64241720 has 32 divisors (see below), whose sum is σ = 144789120. Its totient is φ = 25653120.

The previous prime is 64241719. The next prime is 64241747. The reversal of 64241720 is 2714246.

It is a self number, because there is not a number n which added to its sum of digits gives 64241720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33590 + ... + 35450.

It is an arithmetic number, because the mean of its divisors is an integer number (4524660).

Almost surely, 2^64241720 is an apocalyptic number.

It is an amenable number.

64241720 is an abundant number, since it is smaller than the sum of its proper divisors (80547400).

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

64241720 is a wasteful number, since it uses less digits than its factorization.

64241720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735 (or 2731 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 64241720 is about 8015.0932620900. The cubic root of 64241720 is about 400.5029506698.

Adding to 64241720 its reverse (2714246), we get a palindrome (66955966).

The spelling of 64241720 in words is "sixty-four million, two hundred forty-one thousand, seven hundred twenty".