78545452 has 12 divisors (see below), whose sum is σ = 137669616. Its totient is φ = 39211280.

The previous prime is 78545443. The next prime is 78545471. The reversal of 78545452 is 25454587.

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

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, 12424 + ... + 17647.

It is an arithmetic number, because the mean of its divisors is an integer number (11472468).

Almost surely, 2^78545452 is an apocalyptic number.

It is an amenable number.

78545452 is a deficient number, since it is larger than the sum of its proper divisors (59124164).

78545452 is a wasteful number, since it uses less digits than its factorization.

78545452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30728 (or 30726 counting only the distinct ones).

The product of its digits is 224000, while the sum is 40.

The square root of 78545452 is about 8862.5872069052. The cubic root of 78545452 is about 428.2595086759.

The spelling of 78545452 in words is "seventy-eight million, five hundred forty-five thousand, four hundred fifty-two".