28980055 has 8 divisors (see below), whose sum is σ = 37451232. Its totient is φ = 21400608.

The previous prime is 28980047. The next prime is 28980067. The reversal of 28980055 is 55008982.

It is a happy number.

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 28980055 - 2³ = 28980047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28979996 and 28980023.

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, 222859 + ... + 222988.

It is an arithmetic number, because the mean of its divisors is an integer number (4681404).

Almost surely, 2^28980055 is an apocalyptic number.

28980055 is a deficient number, since it is larger than the sum of its proper divisors (8471177).

28980055 is a wasteful number, since it uses less digits than its factorization.

28980055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445865.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 28980055 is about 5383.3126418591. The cubic root of 28980055 is about 307.1612326692.

The spelling of 28980055 in words is "twenty-eight million, nine hundred eighty thousand, fifty-five".