28450662240 has 864 divisors, whose sum is σ = 123565448160. Its totient is φ = 5449973760.

The previous prime is 28450662223. The next prime is 28450662257. The reversal of 28450662240 is 4226605482.

It is an interprime number because it is at equal distance from previous prime (28450662223) and next prime (28450662257).

It is a Harshad number since it is a multiple of its sum of digits (39).

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 143 ways as a sum of consecutive naturals, for example, 36996576 + ... + 36997344.

It is an arithmetic number, because the mean of its divisors is an integer number (143015565).

Almost surely, 2^28450662240 is an apocalyptic number.

28450662240 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 28450662240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61782724080).

28450662240 is an abundant number, since it is smaller than the sum of its proper divisors (95114785920).

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

28450662240 is a wasteful number, since it uses less digits than its factorization.

28450662240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 39.

The spelling of 28450662240 in words is "twenty-eight billion, four hundred fifty million, six hundred sixty-two thousand, two hundred forty".