28951356 has 72 divisors (see below), whose sum is σ = 80151120. Its totient is φ = 8107008.

The previous prime is 28951339. The next prime is 28951361. The reversal of 28951356 is 65315982.

It is a congruent number.

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, 30700 + ... + 31628.

It is an arithmetic number, because the mean of its divisors is an integer number (1113210).

Almost surely, 2^28951356 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 28951356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40075560).

28951356 is an abundant number, since it is smaller than the sum of its proper divisors (51199764).

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

28951356 is a wasteful number, since it uses less digits than its factorization.

28951356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003 (or 994 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 28951356 is about 5380.6464295659. The cubic root of 28951356 is about 307.0598050755.

The spelling of 28951356 in words is "twenty-eight million, nine hundred fifty-one thousand, three hundred fifty-six".