28628718 has 16 divisors (see below), whose sum is σ = 57671040. Its totient is φ = 9473976.

The previous prime is 28628683. The next prime is 28628729. The reversal of 28628718 is 81782682.

It is a self number, because there is not a number n which added to its sum of digits gives 28628718.

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, 16330 + ... + 17997.

It is an arithmetic number, because the mean of its divisors is an integer number (3604440).

Almost surely, 2^28628718 is an apocalyptic number.

28628718 is an abundant number, since it is smaller than the sum of its proper divisors (29042322).

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

28628718 is a wasteful number, since it uses less digits than its factorization.

28628718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34471.

The product of its digits is 86016, while the sum is 42.

The square root of 28628718 is about 5350.5810899378. The cubic root of 28628718 is about 305.9149022199.

The spelling of 28628718 in words is "twenty-eight million, six hundred twenty-eight thousand, seven hundred eighteen".