28903212 has 72 divisors (see below), whose sum is σ = 79395680. Its totient is φ = 8812800.

The previous prime is 28903211. The next prime is 28903219. The reversal of 28903212 is 21230982.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28903211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70464 + ... + 70872.

Almost surely, 2^28903212 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 28903212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39697840).

28903212 is an abundant number, since it is smaller than the sum of its proper divisors (50492468).

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

28903212 is a wasteful number, since it uses less digits than its factorization.

28903212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 28903212 is about 5376.1707562167. The cubic root of 28903212 is about 306.8895045983.

The spelling of 28903212 in words is "twenty-eight million, nine hundred three thousand, two hundred twelve".