42780708 has 18 divisors (see below), whose sum is σ = 108140214. Its totient is φ = 14260224.

The previous prime is 42780707. The next prime is 42780779. The reversal of 42780708 is 80708724.

It can be written as a sum of positive squares in only one way, i.e., 22638564 + 20142144 = 4758^2 + 4488^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1188353 = 42780708 / (4 + 2 + 7 + 8 + 0 + 7 + 0 + 8).

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (42780707) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 594141 + ... + 594212.

Almost surely, 2^42780708 is an apocalyptic number.

It is an amenable number.

42780708 is an abundant number, since it is smaller than the sum of its proper divisors (65359506).

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

42780708 is a wasteful number, since it uses less digits than its factorization.

42780708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188363 (or 1188358 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 42780708 is about 6540.6962932092. The cubic root of 42780708 is about 349.7432348086.

The spelling of 42780708 in words is "forty-two million, seven hundred eighty thousand, seven hundred eight".