42858978 has 8 divisors (see below), whose sum is σ = 85717968. Its totient is φ = 14286324.

The previous prime is 42858973. The next prime is 42859031. The reversal of 42858978 is 87985824.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

42858978 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 42858978.

It is not an unprimeable number, because it can be changed into a prime (42858973) 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, 3571576 + ... + 3571587.

It is an arithmetic number, because the mean of its divisors is an integer number (10714746).

Almost surely, 2^42858978 is an apocalyptic number.

42858978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

42858978 is a wasteful number, since it uses less digits than its factorization.

42858978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7143168.

The product of its digits is 1290240, while the sum is 51.

The square root of 42858978 is about 6546.6768669303. The cubic root of 42858978 is about 349.9563972893.

The spelling of 42858978 in words is "forty-two million, eight hundred fifty-eight thousand, nine hundred seventy-eight".