1328504220 has 48 divisors (see below), whose sum is σ = 4133125920. Its totient is φ = 354267648.

The previous prime is 1328504171. The next prime is 1328504237. The reversal of 1328504220 is 224058231.

1328504220 is a `hidden beast` number, since 132 + 8 + 504 + 2 + 20 = 666.

It is a super-4 number, since 4×1328504220⁴ (a number of 38 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1229557 + ... + 1230636.

It is an arithmetic number, because the mean of its divisors is an integer number (86106790).

Almost surely, 2^1328504220 is an apocalyptic number.

1328504220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1328504220 is an abundant number, since it is smaller than the sum of its proper divisors (2804621700).

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

1328504220 is a wasteful number, since it uses less digits than its factorization.

1328504220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460211 (or 2460203 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 1328504220 is about 36448.6518269195. The cubic root of 1328504220 is about 1099.3120271112.

The spelling of 1328504220 in words is "one billion, three hundred twenty-eight million, five hundred four thousand, two hundred twenty".