28873830 has 16 divisors (see below), whose sum is σ = 69297264. Its totient is φ = 7699680.

The previous prime is 28873811. The next prime is 28873849. The reversal of 28873830 is 3837882.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28873811) and next prime (28873849).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481201 + ... + 481260.

It is an arithmetic number, because the mean of its divisors is an integer number (4331079).

Almost surely, 2^28873830 is an apocalyptic number.

28873830 is an abundant number, since it is smaller than the sum of its proper divisors (40423434).

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

28873830 is a wasteful number, since it uses less digits than its factorization.

28873830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962471.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 28873830 is about 5373.4374472957. The cubic root of 28873830 is about 306.7854782751.

The spelling of 28873830 in words is "twenty-eight million, eight hundred seventy-three thousand, eight hundred thirty".