64243634 has 32 divisors (see below), whose sum is σ = 121376640. Its totient is φ = 24820992.

The previous prime is 64243633. The next prime is 64243643. The reversal of 64243634 is 43634246.

It is a self number, because there is not a number n which added to its sum of digits gives 64243634.

It is not an unprimeable number, because it can be changed into a prime (64243631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3722 + ... + 11930.

It is an arithmetic number, because the mean of its divisors is an integer number (3793020).

Almost surely, 2^64243634 is an apocalyptic number.

64243634 is a deficient number, since it is larger than the sum of its proper divisors (57133006).

64243634 is a wasteful number, since it uses less digits than its factorization.

64243634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8274.

The product of its digits is 41472, while the sum is 32.

The square root of 64243634 is about 8015.2126609342. The cubic root of 64243634 is about 400.5069281216.

The spelling of 64243634 in words is "sixty-four million, two hundred forty-three thousand, six hundred thirty-four".