28647555 has 8 divisors (see below), whose sum is σ = 45836112. Its totient is φ = 15278688.

The previous prime is 28647529. The next prime is 28647559. The reversal of 28647555 is 55574682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28647555 - 2⁷ = 28647427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28647559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 954904 + ... + 954933.

It is an arithmetic number, because the mean of its divisors is an integer number (5729514).

Almost surely, 2^28647555 is an apocalyptic number.

28647555 is a deficient number, since it is larger than the sum of its proper divisors (17188557).

28647555 is a wasteful number, since it uses less digits than its factorization.

28647555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909845.

The product of its digits is 336000, while the sum is 42.

The square root of 28647555 is about 5352.3410765757. The cubic root of 28647555 is about 305.9819823643.

The spelling of 28647555 in words is "twenty-eight million, six hundred forty-seven thousand, five hundred fifty-five".