42978700 has 36 divisors (see below), whose sum is σ = 94143280. Its totient is φ = 17029440.

The previous prime is 42978659. The next prime is 42978721. The reversal of 42978700 is 787924.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 42978700.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8929 + ... + 12871.

Almost surely, 2^42978700 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 42978700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47071640).

42978700 is an abundant number, since it is smaller than the sum of its proper divisors (51164580).

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

42978700 is a wasteful number, since it uses less digits than its factorization.

42978700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066 (or 4059 counting only the distinct ones).

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

The square root of 42978700 is about 6555.8142133529. The cubic root of 42978700 is about 350.2819496794.

The spelling of 42978700 in words is "forty-two million, nine hundred seventy-eight thousand, seven hundred".