64628742 has 16 divisors (see below), whose sum is σ = 132264000. Its totient is φ = 21041832.

The previous prime is 64628723. The next prime is 64628779. The reversal of 64628742 is 24782646.

It is a self number, because there is not a number n which added to its sum of digits gives 64628742.

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 7 ways as a sum of consecutive naturals, for example, 124992 + ... + 125507.

It is an arithmetic number, because the mean of its divisors is an integer number (8266500).

Almost surely, 2^64628742 is an apocalyptic number.

64628742 is an abundant number, since it is smaller than the sum of its proper divisors (67635258).

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

64628742 is a wasteful number, since it uses less digits than its factorization.

64628742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250547.

The product of its digits is 129024, while the sum is 39.

The square root of 64628742 is about 8039.2003333665. The cubic root of 64628742 is about 401.3056129670.

The spelling of 64628742 in words is "sixty-four million, six hundred twenty-eight thousand, seven hundred forty-two".