42278516 has 12 divisors (see below), whose sum is σ = 84557088. Its totient is φ = 18119352.

The previous prime is 42278501. The next prime is 42278527. The reversal of 42278516 is 61587224.

42278516 is an admirable number.

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, 754946 + ... + 755001.

It is an arithmetic number, because the mean of its divisors is an integer number (7046424).

Almost surely, 2^42278516 is an apocalyptic number.

It is an amenable number.

42278516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42278516 is a wasteful number, since it uses less digits than its factorization.

42278516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509958 (or 1509956 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 42278516 is about 6502.1931684625. The cubic root of 42278516 is about 348.3693286877.

The spelling of 42278516 in words is "forty-two million, two hundred seventy-eight thousand, five hundred sixteen".