1338447980 has 24 divisors (see below), whose sum is σ = 2850331680. Its totient is φ = 527838080.

The previous prime is 1338447973. The next prime is 1338447983. The reversal of 1338447980 is 897448331.

It is not an unprimeable number, because it can be changed into a prime (1338447983) 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, 469865 + ... + 472704.

It is an arithmetic number, because the mean of its divisors is an integer number (118763820).

Almost surely, 2^1338447980 is an apocalyptic number.

1338447980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1338447980 is an abundant number, since it is smaller than the sum of its proper divisors (1511883700).

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

1338447980 is a wasteful number, since it uses less digits than its factorization.

1338447980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942649 (or 942647 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 1338447980 is about 36584.8053158685. The cubic root of 1338447980 is about 1102.0479698663.

The spelling of 1338447980 in words is "one billion, three hundred thirty-eight million, four hundred forty-seven thousand, nine hundred eighty".