64215794 has 8 divisors (see below), whose sum is σ = 98927148. Its totient is φ = 31240080.

The previous prime is 64215779. The next prime is 64215797. The reversal of 64215794 is 49751246.

It can be written as a sum of positive squares in 2 ways, for example, as 62615569 + 1600225 = 7913^2 + 1265^2 .

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

It is not an unprimeable number, because it can be changed into a prime (64215797) 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, 433817 + ... + 433964.

Almost surely, 2^64215794 is an apocalyptic number.

64215794 is a deficient number, since it is larger than the sum of its proper divisors (34711354).

64215794 is a wasteful number, since it uses less digits than its factorization.

64215794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867820.

The product of its digits is 60480, while the sum is 38.

The square root of 64215794 is about 8013.4757752176. The cubic root of 64215794 is about 400.4490664929.

The spelling of 64215794 in words is "sixty-four million, two hundred fifteen thousand, seven hundred ninety-four".