42278224 has 10 divisors (see below), whose sum is σ = 81914090. Its totient is φ = 21139104.

The previous prime is 42278213. The next prime is 42278227. The reversal of 42278224 is 42287224.

It can be written as a sum of positive squares in only one way, i.e., 42250000 + 28224 = 6500^2 + 168^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42278227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321179 + ... + 1321210.

It is an arithmetic number, because the mean of its divisors is an integer number (8191409).

Almost surely, 2^42278224 is an apocalyptic number.

It is an amenable number.

42278224 is a deficient number, since it is larger than the sum of its proper divisors (39635866).

42278224 is a wasteful number, since it uses less digits than its factorization.

42278224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642397 (or 2642391 counting only the distinct ones).

The product of its digits is 14336, while the sum is 31.

The square root of 42278224 is about 6502.1707144614. The cubic root of 42278224 is about 348.3685266722.

The spelling of 42278224 in words is "forty-two million, two hundred seventy-eight thousand, two hundred twenty-four".