28990530072 has 128 divisors (see below), whose sum is σ = 92136960000. Its totient is φ = 8273691648.

The previous prime is 28990530061. The next prime is 28990530091. The reversal of 28990530072 is 27003509982.

28990530072 is a `hidden beast` number, since 28 + 9 + 90 + 530 + 0 + 7 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1394329 + ... + 1414967.

It is an arithmetic number, because the mean of its divisors is an integer number (719820000).

Almost surely, 2^28990530072 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 28990530072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46068480000).

28990530072 is an abundant number, since it is smaller than the sum of its proper divisors (63146429928).

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

28990530072 is a wasteful number, since it uses less digits than its factorization.

28990530072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21590 (or 21580 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 28990530072 in words is "twenty-eight billion, nine hundred ninety million, five hundred thirty thousand, seventy-two".