42240064 has 14 divisors (see below), whose sum is σ = 83820254. Its totient is φ = 21120000.

The previous prime is 42240049. The next prime is 42240089. The reversal of 42240064 is 46004224.

It can be written as a sum of positive squares in only one way, i.e., 35521600 + 6718464 = 5960^2 + 2592^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329937 + ... + 330064.

It is an arithmetic number, because the mean of its divisors is an integer number (5987161).

Almost surely, 2^42240064 is an apocalyptic number.

It is an amenable number.

42240064 is a deficient number, since it is larger than the sum of its proper divisors (41580190).

42240064 is an equidigital number, since it uses as much as digits as its factorization.

42240064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660013 (or 660003 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 42240064 is about 6499.2356473665. The cubic root of 42240064 is about 348.2636835375.

Adding to 42240064 its reverse (46004224), we get a palindrome (88244288).

The spelling of 42240064 in words is "forty-two million, two hundred forty thousand, sixty-four".