28877870 has 32 divisors (see below), whose sum is σ = 60032448. Its totient is φ = 9796608.

The previous prime is 28877869. The next prime is 28877873. The reversal of 28877870 is 7877882.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28877873) 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, 4664 + ... + 8916.

It is an arithmetic number, because the mean of its divisors is an integer number (1876014).

Almost surely, 2^28877870 is an apocalyptic number.

28877870 is an abundant number, since it is smaller than the sum of its proper divisors (31154578).

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

28877870 is a wasteful number, since it uses less digits than its factorization.

28877870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4364.

The product of its (nonzero) digits is 351232, while the sum is 47.

The square root of 28877870 is about 5373.8133573841. The cubic root of 28877870 is about 306.7997859894.

The spelling of 28877870 in words is "twenty-eight million, eight hundred seventy-seven thousand, eight hundred seventy".