28898870 has 64 divisors (see below), whose sum is σ = 69866496. Its totient is φ = 8311680.

The previous prime is 28898869. The next prime is 28898893. The reversal of 28898870 is 7889882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8567 + ... + 11453.

It is an arithmetic number, because the mean of its divisors is an integer number (1091664).

Almost surely, 2^28898870 is an apocalyptic number.

28898870 is an abundant number, since it is smaller than the sum of its proper divisors (40967626).

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

28898870 is a wasteful number, since it uses less digits than its factorization.

28898870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925.

The product of its (nonzero) digits is 516096, while the sum is 50.

The square root of 28898870 is about 5375.7669220308. The cubic root of 28898870 is about 306.8741362837.

It can be divided in two parts, 28 and 898870, that added together give a palindrome (898898).

The spelling of 28898870 in words is "twenty-eight million, eight hundred ninety-eight thousand, eight hundred seventy".