28421342208 has 704 divisors, whose sum is σ = 102055232000. Its totient is φ = 7900913664.

The previous prime is 28421342141. The next prime is 28421342263. The reversal of 28421342208 is 80224312482.

28421342208 is a `hidden beast` number, since 2 + 8 + 421 + 3 + 4 + 220 + 8 = 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 polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 768144366 + ... + 768144402.

Almost surely, 2^28421342208 is an apocalyptic number.

28421342208 is a gapful number since it is divisible by the number (28) 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 28421342208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51027616000).

28421342208 is an abundant number, since it is smaller than the sum of its proper divisors (73633889792).

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

28421342208 is an frugal number, since it uses more digits than its factorization.

28421342208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The spelling of 28421342208 in words is "twenty-eight billion, four hundred twenty-one million, three hundred forty-two thousand, two hundred eight".