78567870 has 32 divisors (see below), whose sum is σ = 190955520. Its totient is φ = 20685600.

The previous prime is 78567851. The next prime is 78567871. The reversal of 78567870 is 7876587.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78567871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14206 + ... + 18945.

It is an arithmetic number, because the mean of its divisors is an integer number (5967360).

Almost surely, 2^78567870 is an apocalyptic number.

78567870 is an abundant number, since it is smaller than the sum of its proper divisors (112387650).

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

78567870 is a wasteful number, since it uses less digits than its factorization.

78567870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33240.

The product of its (nonzero) digits is 658560, while the sum is 48.

The square root of 78567870 is about 8863.8518715060. The cubic root of 78567870 is about 428.3002486049.

The spelling of 78567870 in words is "seventy-eight million, five hundred sixty-seven thousand, eight hundred seventy".