203664860728 has 128 divisors (see below), whose sum is σ = 460660608000. Its totient is φ = 82569876480.

The previous prime is 203664860719. The next prime is 203664860771. The reversal of 203664860728 is 827068466302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29987013 + ... + 29993803.

It is an arithmetic number, because the mean of its divisors is an integer number (3598911000).

Almost surely, 2^203664860728 is an apocalyptic number.

203664860728 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 203664860728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230330304000).

203664860728 is an abundant number, since it is smaller than the sum of its proper divisors (256995747272).

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

203664860728 is a wasteful number, since it uses less digits than its factorization.

203664860728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7205 (or 7201 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 52.

The spelling of 203664860728 in words is "two hundred three billion, six hundred sixty-four million, eight hundred sixty thousand, seven hundred twenty-eight".