28961088 has 112 divisors (see below), whose sum is σ = 84831936. Its totient is φ = 8663040.

The previous prime is 28961077. The next prime is 28961123. The reversal of 28961088 is 88016982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102195 + ... + 102477.

It is an arithmetic number, because the mean of its divisors is an integer number (757428).

Almost surely, 2^28961088 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 28961088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42415968).

28961088 is an abundant number, since it is smaller than the sum of its proper divisors (55870848).

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

28961088 is a wasteful number, since it uses less digits than its factorization.

28961088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 28961088 is about 5381.5507058839. The cubic root of 28961088 is about 307.0942072782.

The spelling of 28961088 in words is "twenty-eight million, nine hundred sixty-one thousand, eighty-eight".