78538544 has 40 divisors (see below), whose sum is σ = 174417408. Its totient is φ = 33560640.

The previous prime is 78538543. The next prime is 78538549. The reversal of 78538544 is 44583587.

It is a junction number, because it is equal to n+sod(n) for n = 78538495 and 78538504.

It is not an unprimeable number, because it can be changed into a prime (78538541) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 47459 + ... + 49085.

Almost surely, 2^78538544 is an apocalyptic number.

It is an amenable number.

78538544 is an abundant number, since it is smaller than the sum of its proper divisors (95878864).

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

78538544 is a wasteful number, since it uses less digits than its factorization.

78538544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073 (or 2067 counting only the distinct ones).

The product of its digits is 537600, while the sum is 44.

The square root of 78538544 is about 8862.1974701538. The cubic root of 78538544 is about 428.2469532983.

The spelling of 78538544 in words is "seventy-eight million, five hundred thirty-eight thousand, five hundred forty-four".