42240208 has 10 divisors (see below), whose sum is σ = 81840434. Its totient is φ = 21120096.

The previous prime is 42240181. The next prime is 42240221. The reversal of 42240208 is 80204224.

It can be written as a sum of positive squares in only one way, i.e., 36820624 + 5419584 = 6068^2 + 2328^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319991 + ... + 1320022.

Almost surely, 2^42240208 is an apocalyptic number.

It is an amenable number.

42240208 is a deficient number, since it is larger than the sum of its proper divisors (39600226).

42240208 is a wasteful number, since it uses less digits than its factorization.

42240208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640021 (or 2640015 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 42240208 is about 6499.2467255829. The cubic root of 42240208 is about 348.2640792907.

The spelling of 42240208 in words is "forty-two million, two hundred forty thousand, two hundred eight".