78613452 has 18 divisors (see below), whose sum is σ = 198717428. Its totient is φ = 26204472.

The previous prime is 78613373. The next prime is 78613463. The reversal of 78613452 is 25431687.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2183707 = 78613452 / (7 + 8 + 6 + 1 + 3 + 4 + 5 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1091818 + ... + 1091889.

Almost surely, 2^78613452 is an apocalyptic number.

It is an amenable number.

78613452 is an abundant number, since it is smaller than the sum of its proper divisors (120103976).

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

78613452 is a wasteful number, since it uses less digits than its factorization.

78613452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2183717 (or 2183712 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 78613452 is about 8866.4227284740. The cubic root of 78613452 is about 428.3830602670.

The spelling of 78613452 in words is "seventy-eight million, six hundred thirteen thousand, four hundred fifty-two".