1320018880 has 56 divisors (see below), whose sum is σ = 3167390160. Its totient is φ = 523960320.

The previous prime is 1320018871. The next prime is 1320018881. The reversal of 1320018880 is 888100231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320018881) 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, 26176 + ... + 57664.

Almost surely, 2^1320018880 is an apocalyptic number.

1320018880 is a gapful number since it is divisible by the number (10) 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 1320018880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1583695080).

1320018880 is an abundant number, since it is smaller than the sum of its proper divisors (1847371280).

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

1320018880 is a wasteful number, since it uses less digits than its factorization.

1320018880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31637 (or 31627 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 1320018880 is about 36332.0640756894. The cubic root of 1320018880 is about 1096.9665404185.

The spelling of 1320018880 in words is "one billion, three hundred twenty million, eighteen thousand, eight hundred eighty".