28920936 has 96 divisors (see below), whose sum is σ = 83119680. Its totient is φ = 8363520.

The previous prime is 28920919. The next prime is 28920943. The reversal of 28920936 is 63902982.

It is a junction number, because it is equal to n+sod(n) for n = 28920894 and 28920903.

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, 66576 + ... + 67008.

It is an arithmetic number, because the mean of its divisors is an integer number (865830).

Almost surely, 2^28920936 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 28920936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41559840).

28920936 is an abundant number, since it is smaller than the sum of its proper divisors (54198744).

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

28920936 is a wasteful number, since it uses less digits than its factorization.

28920936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 28920936 is about 5377.8188887318. The cubic root of 28920936 is about 306.9522219429.

The spelling of 28920936 in words is "twenty-eight million, nine hundred twenty thousand, nine hundred thirty-six".