1328188550 has 48 divisors (see below), whose sum is σ = 2672381040. Its totient is φ = 488211840.

The previous prime is 1328188541. The next prime is 1328188571. The reversal of 1328188550 is 558818231.

It is a super-2 number, since 2×1328188550² = 3528169648702205000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1328188498 and 1328188507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144389 + ... + 153311.

It is an arithmetic number, because the mean of its divisors is an integer number (55674605).

Almost surely, 2^1328188550 is an apocalyptic number.

1328188550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1328188550 is an abundant number, since it is smaller than the sum of its proper divisors (1344192490).

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

1328188550 is a wasteful number, since it uses less digits than its factorization.

1328188550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9177 (or 9172 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 41.

The square root of 1328188550 is about 36444.3212311603. The cubic root of 1328188550 is about 1099.2249499027.

The spelling of 1328188550 in words is "one billion, three hundred twenty-eight million, one hundred eighty-eight thousand, five hundred fifty".