1386172856 has 32 divisors (see below), whose sum is σ = 2691327600. Its totient is φ = 668532480.

The previous prime is 1386172817. The next prime is 1386172861. The reversal of 1386172856 is 6582716831.

It is a super-2 number, since 2×1386172856² = 3842950373422393472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1386172856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304211 + ... + 308733.

Almost surely, 2^1386172856 is an apocalyptic number.

It is an amenable number.

1386172856 is a deficient number, since it is larger than the sum of its proper divisors (1305154744).

1386172856 is a wasteful number, since it uses less digits than its factorization.

1386172856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5879 (or 5875 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 1386172856 is about 37231.3423878323. The cubic root of 1386172856 is about 1114.9938281144.

The spelling of 1386172856 in words is "one billion, three hundred eighty-six million, one hundred seventy-two thousand, eight hundred fifty-six".