28422704640 has 320 divisors, whose sum is σ = 102331164672. Its totient is φ = 6667468800.

The previous prime is 28422704603. The next prime is 28422704657. The reversal of 28422704640 is 4640722482.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2613454 + ... + 2624306.

Almost surely, 2^28422704640 is an apocalyptic number.

28422704640 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 28422704640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51165582336).

28422704640 is an abundant number, since it is smaller than the sum of its proper divisors (73908460032).

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

28422704640 is a wasteful number, since it uses less digits than its factorization.

28422704640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10921 (or 10905 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 39.

The spelling of 28422704640 in words is "twenty-eight billion, four hundred twenty-two million, seven hundred four thousand, six hundred forty".