42388768 has 12 divisors (see below), whose sum is σ = 83452950. Its totient is φ = 21194368.

The previous prime is 42388763. The next prime is 42388777. The reversal of 42388768 is 86788324.

It can be written as a sum of positive squares in only one way, i.e., 37601424 + 4787344 = 6132^2 + 2188^2 .

It is not an unprimeable number, because it can be changed into a prime (42388763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662293 + ... + 662356.

Almost surely, 2^42388768 is an apocalyptic number.

It is an amenable number.

42388768 is a deficient number, since it is larger than the sum of its proper divisors (41064182).

42388768 is a wasteful number, since it uses less digits than its factorization.

42388768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324659 (or 1324651 counting only the distinct ones).

The product of its digits is 516096, while the sum is 46.

The square root of 42388768 is about 6510.6657109700. The cubic root of 42388768 is about 348.6718864291.

The spelling of 42388768 in words is "forty-two million, three hundred eighty-eight thousand, seven hundred sixty-eight".