78872452 has 12 divisors (see below), whose sum is σ = 146146140. Its totient is φ = 37116416.

The previous prime is 78872447. The next prime is 78872459. The reversal of 78872452 is 25427887.

It can be written as a sum of positive squares in 2 ways, for example, as 48776256 + 30096196 = 6984^2 + 5486^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78872399 and 78872408.

It is not an unprimeable number, because it can be changed into a prime (78872459) 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, 579877 + ... + 580012.

It is an arithmetic number, because the mean of its divisors is an integer number (12178845).

Almost surely, 2^78872452 is an apocalyptic number.

It is an amenable number.

78872452 is a deficient number, since it is larger than the sum of its proper divisors (67273688).

78872452 is a wasteful number, since it uses less digits than its factorization.

78872452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159910 (or 1159908 counting only the distinct ones).

The product of its digits is 250880, while the sum is 43.

The square root of 78872452 is about 8881.0163832751. The cubic root of 78872452 is about 428.8529950582.

The spelling of 78872452 in words is "seventy-eight million, eight hundred seventy-two thousand, four hundred fifty-two".