42766440 has 32 divisors (see below), whose sum is σ = 128299680. Its totient is φ = 11404352.

The previous prime is 42766439. The next prime is 42766447. The reversal of 42766440 is 4466724.

It is not an unprimeable number, because it can be changed into a prime (42766447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178074 + ... + 178313.

It is an arithmetic number, because the mean of its divisors is an integer number (4009365).

Almost surely, 2^42766440 is an apocalyptic number.

42766440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42766440 is an abundant number, since it is smaller than the sum of its proper divisors (85533240).

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

42766440 is a wasteful number, since it uses less digits than its factorization.

42766440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356401 (or 356397 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 42766440 is about 6539.6054926884. The cubic root of 42766440 is about 349.7043489683.

The spelling of 42766440 in words is "forty-two million, seven hundred sixty-six thousand, four hundred forty".