228357817500 has 240 divisors, whose sum is σ = 725055408000. Its totient is φ = 55700064000.

The previous prime is 228357817469. The next prime is 228357817537. The reversal of 228357817500 is 5718753822.

It is a self number, because there is not a number n which added to its sum of digits gives 228357817500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4104871 + ... + 4160129.

It is an arithmetic number, because the mean of its divisors is an integer number (3021064200).

Almost surely, 2^228357817500 is an apocalyptic number.

228357817500 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 228357817500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362527704000).

228357817500 is an abundant number, since it is smaller than the sum of its proper divisors (496697590500).

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

228357817500 is a wasteful number, since it uses less digits than its factorization.

228357817500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55334 (or 55317 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 48.

The spelling of 228357817500 in words is "two hundred twenty-eight billion, three hundred fifty-seven million, eight hundred seventeen thousand, five hundred".