28913853440 has 176 divisors, whose sum is σ = 73910128320. Its totient is φ = 10821795840.

The previous prime is 28913853433. The next prime is 28913853461. The reversal of 28913853440 is 4435831982.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8072450 + ... + 8076030.

Almost surely, 2^28913853440 is an apocalyptic number.

28913853440 is a gapful number since it is divisible by the number (20) 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 28913853440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36955064160).

28913853440 is an abundant number, since it is smaller than the sum of its proper divisors (44996274880).

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

28913853440 is a wasteful number, since it uses less digits than its factorization.

28913853440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3708 (or 3690 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 28913853440 in words is "twenty-eight billion, nine hundred thirteen million, eight hundred fifty-three thousand, four hundred forty".