1380939828 has 12 divisors (see below), whose sum is σ = 3222192960. Its totient is φ = 460313272.

The previous prime is 1380939827. The next prime is 1380939851. The reversal of 1380939828 is 8289390831.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380939823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57539148 + ... + 57539171.

It is an arithmetic number, because the mean of its divisors is an integer number (268516080).

Almost surely, 2^1380939828 is an apocalyptic number.

It is an amenable number.

1380939828 is an abundant number, since it is smaller than the sum of its proper divisors (1841253132).

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

1380939828 is a wasteful number, since it uses less digits than its factorization.

1380939828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115078326 (or 115078324 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 1380939828 is about 37160.9987486881. The cubic root of 1380939828 is about 1113.5889644118.

The spelling of 1380939828 in words is "one billion, three hundred eighty million, nine hundred thirty-nine thousand, eight hundred twenty-eight".