78536428 has 12 divisors (see below), whose sum is σ = 139179040. Its totient is φ = 38770992.

The previous prime is 78536417. The next prime is 78536431. The reversal of 78536428 is 82463587.

78536428 is nontrivially palindromic in base 3.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123951 + ... + 124582.

Almost surely, 2^78536428 is an apocalyptic number.

It is an amenable number.

78536428 is a deficient number, since it is larger than the sum of its proper divisors (60642612).

78536428 is a wasteful number, since it uses less digits than its factorization.

78536428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248616 (or 248614 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 78536428 is about 8862.0780858668. The cubic root of 78536428 is about 428.2431072942.

The spelling of 78536428 in words is "seventy-eight million, five hundred thirty-six thousand, four hundred twenty-eight".