42790780 has 12 divisors (see below), whose sum is σ = 89860680. Its totient is φ = 17116304.

The previous prime is 42790729. The next prime is 42790789. The reversal of 42790780 is 8709724.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42790789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1069750 + ... + 1069789.

It is an arithmetic number, because the mean of its divisors is an integer number (7488390).

Almost surely, 2^42790780 is an apocalyptic number.

It is an amenable number.

42790780 is an abundant number, since it is smaller than the sum of its proper divisors (47069900).

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

42790780 is a wasteful number, since it uses less digits than its factorization.

42790780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139548 (or 2139546 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 42790780 is about 6541.4661965037. The cubic root of 42790780 is about 349.7706797139.

The spelling of 42790780 in words is "forty-two million, seven hundred ninety thousand, seven hundred eighty".