28628487 has 12 divisors (see below), whose sum is σ = 41479360. Its totient is φ = 19027008.

The previous prime is 28628473. The next prime is 28628489. The reversal of 28628487 is 78482682.

It is a happy number.

It is not a de Polignac number, because 28628487 - 2⁴ = 28628471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28628489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1687 + ... + 7752.

Almost surely, 2^28628487 is an apocalyptic number.

28628487 is a deficient number, since it is larger than the sum of its proper divisors (12850873).

28628487 is a wasteful number, since it uses less digits than its factorization.

28628487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9782 (or 9779 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 28628487 is about 5350.5595034538. The cubic root of 28628487 is about 305.9140794269.

The spelling of 28628487 in words is "twenty-eight million, six hundred twenty-eight thousand, four hundred eighty-seven".