1388519980 has 24 divisors (see below), whose sum is σ = 2917081440. Its totient is φ = 555181440.

The previous prime is 1388519969. The next prime is 1388519987. The reversal of 1388519980 is 899158831.

It is not an unprimeable number, because it can be changed into a prime (1388519987) 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, 41416 + ... + 67024.

It is an arithmetic number, because the mean of its divisors is an integer number (121545060).

Almost surely, 2^1388519980 is an apocalyptic number.

1388519980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1388519980 is an abundant number, since it is smaller than the sum of its proper divisors (1528561460).

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

1388519980 is a wasteful number, since it uses less digits than its factorization.

1388519980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28329 (or 28327 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 52.

The square root of 1388519980 is about 37262.8498641744. The cubic root of 1388519980 is about 1115.6227908165.

The spelling of 1388519980 in words is "one billion, three hundred eighty-eight million, five hundred nineteen thousand, nine hundred eighty".