64340442 has 24 divisors (see below), whose sum is σ = 139838400. Its totient is φ = 21380040.

The previous prime is 64340431. The next prime is 64340449. The reversal of 64340442 is 24404346.

It is not an unprimeable number, because it can be changed into a prime (64340449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 559 + ... + 11357.

It is an arithmetic number, because the mean of its divisors is an integer number (5826600).

Almost surely, 2^64340442 is an apocalyptic number.

64340442 is an abundant number, since it is smaller than the sum of its proper divisors (75497958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64340442 is a wasteful number, since it uses less digits than its factorization.

64340442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11138 (or 11135 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 64340442 is about 8021.2494039270. The cubic root of 64340442 is about 400.7080002664.

Adding to 64340442 its reverse (24404346), we get a palindrome (88744788).

The spelling of 64340442 in words is "sixty-four million, three hundred forty thousand, four hundred forty-two".