42766840 has 16 divisors (see below), whose sum is σ = 96225480. Its totient is φ = 17106720.

The previous prime is 42766819. The next prime is 42766961. The reversal of 42766840 is 4866724.

It is a self number, because there is not a number n which added to its sum of digits gives 42766840.

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, 534546 + ... + 534625.

Almost surely, 2^42766840 is an apocalyptic number.

42766840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42766840 is an abundant number, since it is smaller than the sum of its proper divisors (53458640).

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

42766840 is a wasteful number, since it uses less digits than its factorization.

42766840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069182 (or 1069178 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 42766840 is about 6539.6360755014. The cubic root of 42766840 is about 349.7054392414.

The spelling of 42766840 in words is "forty-two million, seven hundred sixty-six thousand, eight hundred forty".