78527732 has 6 divisors (see below), whose sum is σ = 137423538. Its totient is φ = 39263864.

The previous prime is 78527731. The next prime is 78527747. The reversal of 78527732 is 23772587.

It can be written as a sum of positive squares in only one way, i.e., 53085796 + 25441936 = 7286^2 + 5044^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78527732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78527731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9815963 + ... + 9815970.

It is an arithmetic number, because the mean of its divisors is an integer number (22903923).

Almost surely, 2^78527732 is an apocalyptic number.

It is an amenable number.

78527732 is a deficient number, since it is larger than the sum of its proper divisors (58895806).

78527732 is a wasteful number, since it uses less digits than its factorization.

78527732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19631937 (or 19631935 counting only the distinct ones).

The product of its digits is 164640, while the sum is 41.

The square root of 78527732 is about 8861.5874424394. The cubic root of 78527732 is about 428.2273008733.

The spelling of 78527732 in words is "seventy-eight million, five hundred twenty-seven thousand, seven hundred thirty-two".