28827870 has 32 divisors (see below), whose sum is σ = 69582240. Its totient is φ = 7643520.

The previous prime is 28827859. The next prime is 28827871. The reversal of 28827870 is 7872882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28827871) 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, 2776 + ... + 8084.

It is an arithmetic number, because the mean of its divisors is an integer number (2174445).

Almost surely, 2^28827870 is an apocalyptic number.

28827870 is an abundant number, since it is smaller than the sum of its proper divisors (40754370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28827870 is a wasteful number, since it uses less digits than its factorization.

28827870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500.

The product of its (nonzero) digits is 100352, while the sum is 42.

The square root of 28827870 is about 5369.1591520461. The cubic root of 28827870 is about 306.6226162836.

The spelling of 28827870 in words is "twenty-eight million, eight hundred twenty-seven thousand, eight hundred seventy".