42766815 has 128 divisors (see below), whose sum is σ = 94832640. Its totient is φ = 15925248.

The previous prime is 42766769. The next prime is 42766819. The reversal of 42766815 is 51866724.

It is not a de Polignac number, because 42766815 - 2⁷ = 42766687 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42766819) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 440847 + ... + 440943.

It is an arithmetic number, because the mean of its divisors is an integer number (740880).

Almost surely, 2^42766815 is an apocalyptic number.

42766815 is an abundant number, since it is smaller than the sum of its proper divisors (52065825).

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

42766815 is a wasteful number, since it uses less digits than its factorization.

42766815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161.

The product of its digits is 80640, while the sum is 39.

The square root of 42766815 is about 6539.6341640798. The cubic root of 42766815 is about 349.7053710995.

Subtracting 42766815 from its reverse (51866724), we obtain a palindrome (9099909).

The spelling of 42766815 in words is "forty-two million, seven hundred sixty-six thousand, eight hundred fifteen".