28904433012 has 648 divisors, whose sum is σ = 100850568000. Its totient is φ = 7221928896.

The previous prime is 28904432983. The next prime is 28904433029. The reversal of 28904433012 is 21033440982.

28904433012 is a `hidden beast` number, since 289 + 0 + 44 + 330 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 1521285939 + ... + 1521285957.

Almost surely, 2^28904433012 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 28904433012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50425284000).

28904433012 is an abundant number, since it is smaller than the sum of its proper divisors (71946134988).

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

28904433012 is an equidigital number, since it uses as much as digits as its factorization.

28904433012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

Adding to 28904433012 its reverse (21033440982), we get a palindrome (49937873994).

The spelling of 28904433012 in words is "twenty-eight billion, nine hundred four million, four hundred thirty-three thousand, twelve".