78589628 has 24 divisors (see below), whose sum is σ = 152117952. Its totient is φ = 35290944.

The previous prime is 78589613. The next prime is 78589631. The reversal of 78589628 is 82698587.

It is a self number, because there is not a number n which added to its sum of digits gives 78589628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18500 + ... + 22347.

It is an arithmetic number, because the mean of its divisors is an integer number (6338248).

Almost surely, 2^78589628 is an apocalyptic number.

It is an amenable number.

78589628 is a deficient number, since it is larger than the sum of its proper divisors (73528324).

78589628 is a wasteful number, since it uses less digits than its factorization.

78589628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40901 (or 40899 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 53.

The square root of 78589628 is about 8865.0791310625. The cubic root of 78589628 is about 428.3397817147.

The spelling of 78589628 in words is "seventy-eight million, five hundred eighty-nine thousand, six hundred twenty-eight".