1380939840 has 672 divisors, whose sum is σ = 5858012160. Its totient is φ = 303077376.

The previous prime is 1380939827. The next prime is 1380939851. The reversal of 1380939840 is 489390831.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 23405731 + ... + 23405789.

It is an arithmetic number, because the mean of its divisors is an integer number (8717280).

Almost surely, 2^1380939840 is an apocalyptic number.

1380939840 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 1380939840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2929006080).

1380939840 is an abundant number, since it is smaller than the sum of its proper divisors (4477072320).

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

1380939840 is an equidigital number, since it uses as much as digits as its factorization.

1380939840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 1380939840 is about 37160.9989101477. The cubic root of 1380939840 is about 1113.5889676374.

The spelling of 1380939840 in words is "one billion, three hundred eighty million, nine hundred thirty-nine thousand, eight hundred forty".