1380939826 has 64 divisors (see below), whose sum is σ = 2619555840. Its totient is φ = 532889280.

The previous prime is 1380939823. The next prime is 1380939827. The reversal of 1380939826 is 6289390831.

It is a self number, because there is not a number n which added to its sum of digits gives 1380939826.

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 31 ways as a sum of consecutive naturals, for example, 367465 + ... + 371203.

It is an arithmetic number, because the mean of its divisors is an integer number (40930560).

Almost surely, 2^1380939826 is an apocalyptic number.

1380939826 is a deficient number, since it is larger than the sum of its proper divisors (1238616014).

1380939826 is a wasteful number, since it uses less digits than its factorization.

1380939826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3839.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 1380939826 is about 37160.9987217782. The cubic root of 1380939826 is about 1113.5889638742.

It can be divided in two parts, 13809 and 39826, that added together give a palindrome (53635).

The spelling of 1380939826 in words is "one billion, three hundred eighty million, nine hundred thirty-nine thousand, eight hundred twenty-six".