42780432 has 80 divisors (see below), whose sum is σ = 118385280. Its totient is φ = 13264896.

The previous prime is 42780421. The next prime is 42780443. The reversal of 42780432 is 23408724.

It is an interprime number because it is at equal distance from previous prime (42780421) and next prime (42780443).

It is a self number, because there is not a number n which added to its sum of digits gives 42780432.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83794 + ... + 84302.

It is an arithmetic number, because the mean of its divisors is an integer number (1479816).

Almost surely, 2^42780432 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 42780432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59192640).

42780432 is an abundant number, since it is smaller than the sum of its proper divisors (75604848).

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

42780432 is a wasteful number, since it uses less digits than its factorization.

42780432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 42780432 is about 6540.6751945040. The cubic root of 42780432 is about 349.7424826834.

The spelling of 42780432 in words is "forty-two million, seven hundred eighty thousand, four hundred thirty-two".