64242750 has 128 divisors (see below), whose sum is σ = 188697600. Its totient is φ = 14352000.

The previous prime is 64242733. The next prime is 64242751. The reversal of 64242750 is 5724246.

64242750 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64242751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 106951 + ... + 107549.

It is an arithmetic number, because the mean of its divisors is an integer number (1474200).

Almost surely, 2^64242750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64242750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94348800).

64242750 is an abundant number, since it is smaller than the sum of its proper divisors (124454850).

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

64242750 is a wasteful number, since it uses less digits than its factorization.

64242750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 633 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 64242750 is about 8015.1575156075. The cubic root of 64242750 is about 400.5050911057.

Adding to 64242750 its reverse (5724246), we get a palindrome (69966996).

The spelling of 64242750 in words is "sixty-four million, two hundred forty-two thousand, seven hundred fifty".