28902321504 has 960 divisors, whose sum is σ = 109771200000. Its totient is φ = 7425395712.

The previous prime is 28902321493. The next prime is 28902321557. The reversal of 28902321504 is 40512320982.

It is a happy number.

28902321504 is a `hidden beast` number, since 28 + 90 + 23 + 21 + 504 = 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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 489869827 + ... + 489869885.

It is an arithmetic number, because the mean of its divisors is an integer number (114345000).

Almost surely, 2^28902321504 is an apocalyptic number.

28902321504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28902321504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54885600000).

28902321504 is an abundant number, since it is smaller than the sum of its proper divisors (80868878496).

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

28902321504 is a wasteful number, since it uses less digits than its factorization.

28902321504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 28902321504 in words is "twenty-eight billion, nine hundred two million, three hundred twenty-one thousand, five hundred four".