78705452 has 12 divisors (see below), whose sum is σ = 157410960. Its totient is φ = 33730896.

The previous prime is 78705443. The next prime is 78705463. The reversal of 78705452 is 25450787.

78705452 is nontrivially palindromic in base 8.

78705452 is an admirable number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1405427 + ... + 1405482.

It is an arithmetic number, because the mean of its divisors is an integer number (13117580).

Almost surely, 2^78705452 is an apocalyptic number.

It is an amenable number.

78705452 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78705452 is a wasteful number, since it uses less digits than its factorization.

78705452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810920 (or 2810918 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 78705452 is about 8871.6093241305. The cubic root of 78705452 is about 428.5501049496.

The spelling of 78705452 in words is "seventy-eight million, seven hundred five thousand, four hundred fifty-two".