28208973936 has 240 divisors, whose sum is σ = 91340216352. Its totient is φ = 7426129920.

The previous prime is 28208973913. The next prime is 28208973959. The reversal of 28208973936 is 63937980282.

It is an interprime number because it is at equal distance from previous prime (28208973913) and next prime (28208973959).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1272580 + ... + 1294556.

Almost surely, 2^28208973936 is an apocalyptic number.

28208973936 is a gapful number since it is divisible by the number (26) 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 28208973936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45670108176).

28208973936 is an abundant number, since it is smaller than the sum of its proper divisors (63131242416).

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

28208973936 is a wasteful number, since it uses less digits than its factorization.

28208973936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22040 (or 22023 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 57.

The spelling of 28208973936 in words is "twenty-eight billion, two hundred eight million, nine hundred seventy-three thousand, nine hundred thirty-six".