28978485 has 16 divisors (see below), whose sum is σ = 46455360. Its totient is φ = 15425280.

The previous prime is 28978463. The next prime is 28978493. The reversal of 28978485 is 58487982.

It is a happy number.

It is not a de Polignac number, because 28978485 - 2⁷ = 28978357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7725 + ... + 10845.

It is an arithmetic number, because the mean of its divisors is an integer number (2903460).

Almost surely, 2^28978485 is an apocalyptic number.

It is an amenable number.

28978485 is a deficient number, since it is larger than the sum of its proper divisors (17476875).

28978485 is a wasteful number, since it uses less digits than its factorization.

28978485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3748.

The product of its digits is 1290240, while the sum is 51.

The square root of 28978485 is about 5383.1668188902. The cubic root of 28978485 is about 307.1556857296.

The spelling of 28978485 in words is "twenty-eight million, nine hundred seventy-eight thousand, four hundred eighty-five".