1980139360 has 96 divisors (see below), whose sum is σ = 4895940672. Its totient is φ = 755988480.

The previous prime is 1980139331. The next prime is 1980139363. The reversal of 1980139360 is 639310891.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980139363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310605 + ... + 316915.

It is an arithmetic number, because the mean of its divisors is an integer number (50999382).

Almost surely, 2^1980139360 is an apocalyptic number.

1980139360 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 1980139360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2447970336).

1980139360 is an abundant number, since it is smaller than the sum of its proper divisors (2915801312).

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

1980139360 is a wasteful number, since it uses less digits than its factorization.

1980139360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6416 (or 6408 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 1980139360 is about 44498.7568365679. The cubic root of 1980139360 is about 1255.7366954511.

The spelling of 1980139360 in words is "one billion, nine hundred eighty million, one hundred thirty-nine thousand, three hundred sixty".