42780180 has 48 divisors (see below), whose sum is σ = 120443904. Its totient is φ = 11345280.

The previous prime is 42780167. The next prime is 42780181. The reversal of 42780180 is 8108724.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a nialpdrome in base 9.

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42780181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9594 + ... + 13326.

It is an arithmetic number, because the mean of its divisors is an integer number (2509248).

Almost surely, 2^42780180 is an apocalyptic number.

It is an amenable number.

42780180 is an abundant number, since it is smaller than the sum of its proper divisors (77663724).

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

42780180 is a wasteful number, since it uses less digits than its factorization.

42780180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3936 (or 3934 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 42780180 is about 6540.6559304094. The cubic root of 42780180 is about 349.7417959576.

The spelling of 42780180 in words is "forty-two million, seven hundred eighty thousand, one hundred eighty".