78546852 has 18 divisors (see below), whose sum is σ = 198549078. Its totient is φ = 26182272.

The previous prime is 78546841. The next prime is 78546859. The reversal of 78546852 is 25864587.

It can be written as a sum of positive squares in only one way, i.e., 75064896 + 3481956 = 8664^2 + 1866^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 78546798 and 78546807.

It is not an unprimeable number, because it can be changed into a prime (78546859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1090893 + ... + 1090964.

Almost surely, 2^78546852 is an apocalyptic number.

It is an amenable number.

78546852 is an abundant number, since it is smaller than the sum of its proper divisors (120002226).

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

78546852 is a wasteful number, since it uses less digits than its factorization.

78546852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181867 (or 2181862 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 78546852 is about 8862.6661902613. Note that the first 3 decimals coincide. The cubic root of 78546852 is about 428.2620531039.

It can be divided in two parts, 7854 and 6852, that added together give a triangular number (14706 = T₁₇₁).

The spelling of 78546852 in words is "seventy-eight million, five hundred forty-six thousand, eight hundred fifty-two".