64223340 has 24 divisors (see below), whose sum is σ = 179825520. Its totient is φ = 17126208.

The previous prime is 64223339. The next prime is 64223359. The reversal of 64223340 is 4332246.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 64223340.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535135 + ... + 535254.

It is an arithmetic number, because the mean of its divisors is an integer number (7492730).

Almost surely, 2^64223340 is an apocalyptic number.

64223340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64223340 is an abundant number, since it is smaller than the sum of its proper divisors (115602180).

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

64223340 is a wasteful number, since it uses less digits than its factorization.

64223340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070401 (or 1070399 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 64223340 is about 8013.9465932835. The cubic root of 64223340 is about 400.4647514727.

Adding to 64223340 its reverse (4332246), we get a palindrome (68555586).

The spelling of 64223340 in words is "sixty-four million, two hundred twenty-three thousand, three hundred forty".