28487655 has 24 divisors (see below), whose sum is σ = 56433312. Its totient is φ = 13022784.

The previous prime is 28487651. The next prime is 28487677. The reversal of 28487655 is 55678482.

It is not a de Polignac number, because 28487655 - 2² = 28487651 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28487655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28487651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44904 + ... + 45533.

It is an arithmetic number, because the mean of its divisors is an integer number (2351388).

Almost surely, 2^28487655 is an apocalyptic number.

28487655 is a deficient number, since it is larger than the sum of its proper divisors (27945657).

28487655 is a wasteful number, since it uses less digits than its factorization.

28487655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90455 (or 90452 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 28487655 is about 5337.3827855982. The cubic root of 28487655 is about 305.4116273237.

The spelling of 28487655 in words is "twenty-eight million, four hundred eighty-seven thousand, six hundred fifty-five".