28688455 has 16 divisors (see below), whose sum is σ = 35481600. Its totient is φ = 22258080.

The previous prime is 28688447. The next prime is 28688467. The reversal of 28688455 is 55488682.

It is not a de Polignac number, because 28688455 - 2³ = 28688447 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, 22690 + ... + 23920.

It is an arithmetic number, because the mean of its divisors is an integer number (2217600).

Almost surely, 2^28688455 is an apocalyptic number.

28688455 is a deficient number, since it is larger than the sum of its proper divisors (6793145).

28688455 is a wasteful number, since it uses less digits than its factorization.

28688455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374.

The product of its digits is 614400, while the sum is 46.

The square root of 28688455 is about 5356.1604718305. The cubic root of 28688455 is about 306.1275295391.

The spelling of 28688455 in words is "twenty-eight million, six hundred eighty-eight thousand, four hundred fifty-five".