42878430 has 128 divisors (see below), whose sum is σ = 133632000. Its totient is φ = 9779616.

The previous prime is 42878401. The next prime is 42878441. The reversal of 42878430 is 3487824.

42878430 is a nontrivial binomial coefficient, being equal to C(9261, 2).

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 92379 + ... + 92841.

It is an arithmetic number, because the mean of its divisors is an integer number (1044000).

Almost surely, 2^42878430 is an apocalyptic number.

42878430 is the 9260-th triangular number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42878430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66816000).

42878430 is an abundant number, since it is smaller than the sum of its proper divisors (90753570).

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

42878430 is a wasteful number, since it uses less digits than its factorization.

42878430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 42878430 is about 6548.1623376334. The cubic root of 42878430 is about 350.0093330845.

The spelling of 42878430 in words is "forty-two million, eight hundred seventy-eight thousand, four hundred thirty".