28628955 has 24 divisors (see below), whose sum is σ = 50122800. Its totient is φ = 15115200.

The previous prime is 28628923. The next prime is 28628981. The reversal of 28628955 is 55982682.

It is not a de Polignac number, because 28628955 - 2⁵ = 28628923 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28628955.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1396 + ... + 7694.

It is an arithmetic number, because the mean of its divisors is an integer number (2088450).

Almost surely, 2^28628955 is an apocalyptic number.

28628955 is a deficient number, since it is larger than the sum of its proper divisors (21493845).

28628955 is a wasteful number, since it uses less digits than its factorization.

28628955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6411 (or 6408 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 28628955 is about 5350.6032370192. The cubic root of 28628955 is about 305.9157463797.

It can be divided in two parts, 286 and 28955, that added together give a square (29241 = 171²).

The spelling of 28628955 in words is "twenty-eight million, six hundred twenty-eight thousand, nine hundred fifty-five".