1380778812 has 240 divisors, whose sum is σ = 4371333120. Its totient is φ = 371692800.

The previous prime is 1380778807. The next prime is 1380778823. The reversal of 1380778812 is 2188770831.

It is a congruent number.

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 79 ways as a sum of consecutive naturals, for example, 2882389 + ... + 2882867.

It is an arithmetic number, because the mean of its divisors is an integer number (18213888).

Almost surely, 2^1380778812 is an apocalyptic number.

1380778812 is a gapful number since it is divisible by the number (12) 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 1380778812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2185666560).

1380778812 is an abundant number, since it is smaller than the sum of its proper divisors (2990554308).

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

1380778812 is a wasteful number, since it uses less digits than its factorization.

1380778812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 1380778812 is about 37158.8322206175. The cubic root of 1380778812 is about 1113.5456816642.

The spelling of 1380778812 in words is "one billion, three hundred eighty million, seven hundred seventy-eight thousand, eight hundred twelve".