78570842 has 16 divisors (see below), whose sum is σ = 137979072. Its totient is φ = 32851680.

The previous prime is 78570841. The next prime is 78570853. The reversal of 78570842 is 24807587.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a self number, because there is not a number n which added to its sum of digits gives 78570842.

It is not an unprimeable number, because it can be changed into a prime (78570841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67868 + ... + 69015.

It is an arithmetic number, because the mean of its divisors is an integer number (8623692).

Almost surely, 2^78570842 is an apocalyptic number.

78570842 is a deficient number, since it is larger than the sum of its proper divisors (59408230).

78570842 is a wasteful number, since it uses less digits than its factorization.

78570842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136933.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 78570842 is about 8864.0195171265. The cubic root of 78570842 is about 428.3056489986.

The spelling of 78570842 in words is "seventy-eight million, five hundred seventy thousand, eight hundred forty-two".