28373600640 has 1024 divisors, whose sum is σ = 120023285760. Its totient is φ = 5529600000.

The previous prime is 28373600623. The next prime is 28373600663. The reversal of 28373600640 is 4600637382.

It is a super-2 number, since 2×28373600640² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 187904565 + ... + 187904715.

It is an arithmetic number, because the mean of its divisors is an integer number (117210240).

Almost surely, 2^28373600640 is an apocalyptic number.

28373600640 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 28373600640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60011642880).

28373600640 is an abundant number, since it is smaller than the sum of its proper divisors (91649685120).

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

28373600640 is a wasteful number, since it uses less digits than its factorization.

28373600640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 39.

The spelling of 28373600640 in words is "twenty-eight billion, three hundred seventy-three million, six hundred thousand, six hundred forty".