28980485 has 4 divisors (see below), whose sum is σ = 34776588. Its totient is φ = 23184384.

The previous prime is 28980463. The next prime is 28980517. The reversal of 28980485 is 58408982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58408982 = 2 ⋅29204491.

It can be written as a sum of positive squares in 2 ways, for example, as 8031556 + 20948929 = 2834^2 + 4577^2 .

It is a cyclic number.

It is not a de Polignac number, because 28980485 - 2⁸ = 28980229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2898044 + ... + 2898053.

It is an arithmetic number, because the mean of its divisors is an integer number (8694147).

Almost surely, 2^28980485 is an apocalyptic number.

It is an amenable number.

28980485 is a deficient number, since it is larger than the sum of its proper divisors (5796103).

28980485 is an equidigital number, since it uses as much as digits as its factorization.

28980485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5796102.

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 28980485 is about 5383.3525799450. The cubic root of 28980485 is about 307.1627518597.

The spelling of 28980485 in words is "twenty-eight million, nine hundred eighty thousand, four hundred eighty-five".