28722834 has 48 divisors (see below), whose sum is σ = 71480448. Its totient is φ = 8165376.

The previous prime is 28722817. The next prime is 28722853. The reversal of 28722834 is 43822782.

28722834 = 292² + 293² + ... + 480².

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31939 + ... + 32825.

It is an arithmetic number, because the mean of its divisors is an integer number (1489176).

Almost surely, 2^28722834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28722834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35740224).

28722834 is an abundant number, since it is smaller than the sum of its proper divisors (42757614).

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

28722834 is a wasteful number, since it uses less digits than its factorization.

28722834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159 (or 1156 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 28722834 is about 5359.3688061189. The cubic root of 28722834 is about 306.2497640426.

The spelling of 28722834 in words is "twenty-eight million, seven hundred twenty-two thousand, eight hundred thirty-four".