42289780 has 48 divisors (see below), whose sum is σ = 96130944. Its totient is φ = 15534720.

The previous prime is 42289771. The next prime is 42289781. The reversal of 42289780 is 8798224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42289781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80599 + ... + 81121.

It is an arithmetic number, because the mean of its divisors is an integer number (2002728).

Almost surely, 2^42289780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42289780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48065472).

42289780 is an abundant number, since it is smaller than the sum of its proper divisors (53841164).

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

42289780 is a wasteful number, since it uses less digits than its factorization.

42289780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856 (or 854 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 42289780 is about 6503.0592800620. The cubic root of 42289780 is about 348.4002638927.

The spelling of 42289780 in words is "forty-two million, two hundred eighty-nine thousand, seven hundred eighty".