42644276 has 12 divisors (see below), whose sum is σ = 76644708. Its totient is φ = 20745792.

The previous prime is 42644269. The next prime is 42644281. The reversal of 42644276 is 67244624.

It can be written as a sum of positive squares in 2 ways, for example, as 40627876 + 2016400 = 6374^2 + 1420^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143921 + ... + 144216.

It is an arithmetic number, because the mean of its divisors is an integer number (6387059).

Almost surely, 2^42644276 is an apocalyptic number.

It is an amenable number.

42644276 is a deficient number, since it is larger than the sum of its proper divisors (34000432).

42644276 is a wasteful number, since it uses less digits than its factorization.

42644276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288178 (or 288176 counting only the distinct ones).

The product of its digits is 64512, while the sum is 35.

The square root of 42644276 is about 6530.2584941180. The cubic root of 42644276 is about 349.3710500459.

The spelling of 42644276 in words is "forty-two million, six hundred forty-four thousand, two hundred seventy-six".