1328923020 has 24 divisors (see below), whose sum is σ = 3720984624. Its totient is φ = 354379456.

The previous prime is 1328923019. The next prime is 1328923027. The reversal of 1328923020 is 203298231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1328923027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11074299 + ... + 11074418.

It is an arithmetic number, because the mean of its divisors is an integer number (155041026).

Almost surely, 2^1328923020 is an apocalyptic number.

1328923020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1328923020 is an abundant number, since it is smaller than the sum of its proper divisors (2392061604).

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

1328923020 is a wasteful number, since it uses less digits than its factorization.

1328923020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22148729 (or 22148727 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1328923020 is about 36454.3964426789. The cubic root of 1328923020 is about 1099.4275313252.

The spelling of 1328923020 in words is "one billion, three hundred twenty-eight million, nine hundred twenty-three thousand, twenty".