64219742 has 8 divisors (see below), whose sum is σ = 96374232. Its totient is φ = 32095000.

The previous prime is 64219741. The next prime is 64219747. The reversal of 64219742 is 24791246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64219741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 884 + ... + 11367.

It is an arithmetic number, because the mean of its divisors is an integer number (12046779).

Almost surely, 2^64219742 is an apocalyptic number.

64219742 is a deficient number, since it is larger than the sum of its proper divisors (32154490).

64219742 is a wasteful number, since it uses less digits than its factorization.

64219742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14874.

The product of its digits is 24192, while the sum is 35.

The square root of 64219742 is about 8013.7221064871. The cubic root of 64219742 is about 400.4572728879.

The spelling of 64219742 in words is "sixty-four million, two hundred nineteen thousand, seven hundred forty-two".