78947850 has 48 divisors (see below), whose sum is σ = 206102880. Its totient is φ = 19944000.

The previous prime is 78947849. The next prime is 78947851. The reversal of 78947850 is 5874987.

It is an interprime number because it is at equal distance from previous prime (78947849) and next prime (78947851).

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

It is a self number, because there is not a number n which added to its sum of digits gives 78947850.

It is not an unprimeable number, because it can be changed into a prime (78947851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11001 + ... + 16700.

It is an arithmetic number, because the mean of its divisors is an integer number (4293810).

Almost surely, 2^78947850 is an apocalyptic number.

78947850 is an abundant number, since it is smaller than the sum of its proper divisors (127155030).

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

78947850 is a wasteful number, since it uses less digits than its factorization.

78947850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27735 (or 27730 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The square root of 78947850 is about 8885.2602663062. The cubic root of 78947850 is about 428.9896053252.

It can be divided in two parts, 78947 and 850, that added together give a palindrome (79797).

The spelling of 78947850 in words is "seventy-eight million, nine hundred forty-seven thousand, eight hundred fifty".