28762830 has 64 divisors (see below), whose sum is σ = 77172480. Its totient is φ = 7623072.

The previous prime is 28762819. The next prime is 28762831. The reversal of 28762830 is 3826782.

It is a happy number.

28762830 is a `hidden beast` number, since 28 + 7 + 628 + 3 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28762831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82717 + ... + 83063.

It is an arithmetic number, because the mean of its divisors is an integer number (1205820).

Almost surely, 2^28762830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28762830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38586240).

28762830 is an abundant number, since it is smaller than the sum of its proper divisors (48409650).

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

28762830 is a wasteful number, since it uses less digits than its factorization.

28762830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670 (or 664 counting only the distinct ones).

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

The square root of 28762830 is about 5363.0989176035. The cubic root of 28762830 is about 306.3918471040.

It can be divided in two parts, 28762 and 830, that added together give a palindrome (29592).

The spelling of 28762830 in words is "twenty-eight million, seven hundred sixty-two thousand, eight hundred thirty".