28730862 has 48 divisors (see below), whose sum is σ = 66673152. Its totient is φ = 9263160.

The previous prime is 28730861. The next prime is 28730881. The reversal of 28730862 is 26803782.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28730861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14113 + ... + 16019.

It is an arithmetic number, because the mean of its divisors is an integer number (1389024).

Almost surely, 2^28730862 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28730862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33336576).

28730862 is an abundant number, since it is smaller than the sum of its proper divisors (37942290).

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

28730862 is a wasteful number, since it uses less digits than its factorization.

28730862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955 (or 1943 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28730862 is about 5360.1177225878. The cubic root of 28730862 is about 306.2782935403.

It can be divided in two parts, 28730 and 862, that added together give a palindrome (29592).

The spelling of 28730862 in words is "twenty-eight million, seven hundred thirty thousand, eight hundred sixty-two".