78578452 has 12 divisors (see below), whose sum is σ = 144749920. Its totient is φ = 37221336.

The previous prime is 78578411. The next prime is 78578477. The reversal of 78578452 is 25487587.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 516888 + ... + 517039.

Almost surely, 2^78578452 is an apocalyptic number.

It is an amenable number.

78578452 is a deficient number, since it is larger than the sum of its proper divisors (66171468).

78578452 is a wasteful number, since it uses less digits than its factorization.

78578452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033950 (or 1033948 counting only the distinct ones).

The product of its digits is 627200, while the sum is 46.

The square root of 78578452 is about 8864.4487702282. The cubic root of 78578452 is about 428.3194764384.

The spelling of 78578452 in words is "seventy-eight million, five hundred seventy-eight thousand, four hundred fifty-two".