28894487 has 16 divisors (see below), whose sum is σ = 30551040. Its totient is φ = 27304992.

The previous prime is 28894471. The next prime is 28894501. The reversal of 28894487 is 78449882.

It is a cyclic number.

It is not a de Polignac number, because 28894487 - 2⁴ = 28894471 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 (28894427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280478 + ... + 280580.

It is an arithmetic number, because the mean of its divisors is an integer number (1909440).

Almost surely, 2^28894487 is an apocalyptic number.

28894487 is a deficient number, since it is larger than the sum of its proper divisors (1656553).

28894487 is a wasteful number, since it uses less digits than its factorization.

28894487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302.

The product of its digits is 1032192, while the sum is 50.

The square root of 28894487 is about 5375.3592438087. The cubic root of 28894487 is about 306.8586212902.

The spelling of 28894487 in words is "twenty-eight million, eight hundred ninety-four thousand, four hundred eighty-seven".