28628873 has 8 divisors (see below), whose sum is σ = 35235648. Its totient is φ = 22651344.

The previous prime is 28628843. The next prime is 28628891. The reversal of 28628873 is 37882682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28628873 - 2¹² = 28624777 is a prime.

It is a super-2 number, since 2×28628873² = 1639224738500258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28628843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157211 + ... + 157392.

It is an arithmetic number, because the mean of its divisors is an integer number (4404456).

Almost surely, 2^28628873 is an apocalyptic number.

It is an amenable number.

28628873 is a deficient number, since it is larger than the sum of its proper divisors (6606775).

28628873 is a wasteful number, since it uses less digits than its factorization.

28628873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314623.

The product of its digits is 258048, while the sum is 44.

The square root of 28628873 is about 5350.5955743263. The cubic root of 28628873 is about 305.9154543080.

The spelling of 28628873 in words is "twenty-eight million, six hundred twenty-eight thousand, eight hundred seventy-three".