64243982 has 12 divisors (see below), whose sum is σ = 105923328. Its totient is φ = 29201700.

The previous prime is 64243967. The next prime is 64243987. The reversal of 64243982 is 28934246.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64243987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132494 + ... + 132977.

It is an arithmetic number, because the mean of its divisors is an integer number (8826944).

Almost surely, 2^64243982 is an apocalyptic number.

64243982 is a deficient number, since it is larger than the sum of its proper divisors (41679346).

64243982 is a wasteful number, since it uses less digits than its factorization.

64243982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265495 (or 265484 counting only the distinct ones).

The product of its digits is 82944, while the sum is 38.

The square root of 64243982 is about 8015.2343696239. The cubic root of 64243982 is about 400.5076512862.

The spelling of 64243982 in words is "sixty-four million, two hundred forty-three thousand, nine hundred eighty-two".