1378735386 has 16 divisors (see below), whose sum is σ = 3151395264. Its totient is φ = 393924384.

The previous prime is 1378735381. The next prime is 1378735409. The reversal of 1378735386 is 6835378731.

It is a super-2 number, since 2×1378735386² = 3801822529217137992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1378735381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16413475 + ... + 16413558.

It is an arithmetic number, because the mean of its divisors is an integer number (196962204).

Almost surely, 2^1378735386 is an apocalyptic number.

1378735386 is an abundant number, since it is smaller than the sum of its proper divisors (1772659878).

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

1378735386 is a wasteful number, since it uses less digits than its factorization.

1378735386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32827045.

The product of its digits is 2540160, while the sum is 51.

The square root of 1378735386 is about 37131.3262084725. The cubic root of 1378735386 is about 1112.9960953035.

The spelling of 1378735386 in words is "one billion, three hundred seventy-eight million, seven hundred thirty-five thousand, three hundred eighty-six".