28829790 has 128 divisors (see below), whose sum is σ = 88957440. Its totient is φ = 6566400.

The previous prime is 28829777. The next prime is 28829791. The reversal of 28829790 is 9792882.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28829791) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50205 + ... + 50775.

It is an arithmetic number, because the mean of its divisors is an integer number (694980).

Almost surely, 2^28829790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28829790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44478720).

28829790 is an abundant number, since it is smaller than the sum of its proper divisors (60127650).

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

28829790 is a wasteful number, since it uses less digits than its factorization.

28829790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 28829790 is about 5369.3379480156. The cubic root of 28829790 is about 306.6294233810.

The spelling of 28829790 in words is "twenty-eight million, eight hundred twenty-nine thousand, seven hundred ninety".