1386678172 has 12 divisors (see below), whose sum is σ = 2647294776. Its totient is φ = 630308240.

The previous prime is 1386678131. The next prime is 1386678191. The reversal of 1386678172 is 2718766831.

It is a happy number.

It is a super-3 number, since 3×1386678172³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15757663 + ... + 15757750.

It is an arithmetic number, because the mean of its divisors is an integer number (220607898).

Almost surely, 2^1386678172 is an apocalyptic number.

It is an amenable number.

1386678172 is a deficient number, since it is larger than the sum of its proper divisors (1260616604).

1386678172 is a wasteful number, since it uses less digits than its factorization.

1386678172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31515428 (or 31515426 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The square root of 1386678172 is about 37238.1279336113. The cubic root of 1386678172 is about 1115.1292984177.

The spelling of 1386678172 in words is "one billion, three hundred eighty-six million, six hundred seventy-eight thousand, one hundred seventy-two".