28858830 has 192 divisors, whose sum is σ = 96090624. Its totient is φ = 5356800.

The previous prime is 28858807. The next prime is 28858867. The reversal of 28858830 is 3885882.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 930915 + ... + 930945.

It is an arithmetic number, because the mean of its divisors is an integer number (500472).

Almost surely, 2^28858830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28858830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48045312).

28858830 is an abundant number, since it is smaller than the sum of its proper divisors (67231794).

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

28858830 is a wasteful number, since it uses less digits than its factorization.

28858830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 42.

The square root of 28858830 is about 5372.0415113809. The cubic root of 28858830 is about 306.7323438938.

It can be divided in two parts, 28 and 858830, that added together give a palindrome (858858).

The spelling of 28858830 in words is "twenty-eight million, eight hundred fifty-eight thousand, eight hundred thirty".