28701156 has 48 divisors (see below), whose sum is σ = 73801728. Its totient is φ = 8608800.

The previous prime is 28701149. The next prime is 28701157. The reversal of 28701156 is 65110782.

It is not an unprimeable number, because it can be changed into a prime (28701157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12541 + ... + 14651.

It is an arithmetic number, because the mean of its divisors is an integer number (1537536).

Almost surely, 2^28701156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28701156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36900864).

28701156 is an abundant number, since it is smaller than the sum of its proper divisors (45100572).

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

28701156 is a wasteful number, since it uses less digits than its factorization.

28701156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232 (or 2230 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 28701156 is about 5357.3459847204. The cubic root of 28701156 is about 306.1726993017.

The spelling of 28701156 in words is "twenty-eight million, seven hundred one thousand, one hundred fifty-six".