64320286 has 4 divisors (see below), whose sum is σ = 96480432. Its totient is φ = 32160142.

The previous prime is 64320283. The next prime is 64320287. The reversal of 64320286 is 68202346.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×64320286² = 8274198382243592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64320281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16080070 + ... + 16080073.

It is an arithmetic number, because the mean of its divisors is an integer number (24120108).

Almost surely, 2^64320286 is an apocalyptic number.

64320286 is a deficient number, since it is larger than the sum of its proper divisors (32160146).

64320286 is a wasteful number, since it uses less digits than its factorization.

64320286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32160145.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 64320286 is about 8019.9928927649. The cubic root of 64320286 is about 400.6661524863. Note that the first 3 decimals are identical.

The spelling of 64320286 in words is "sixty-four million, three hundred twenty thousand, two hundred eighty-six".