1386940185 has 16 divisors (see below), whose sum is σ = 2465671680. Its totient is φ = 739701360.

The previous prime is 1386940171. The next prime is 1386940201. The reversal of 1386940185 is 5810496831.

1386940185 is a `hidden beast` number, since 1 + 386 + 94 + 0 + 185 = 666.

It is not a de Polignac number, because 1386940185 - 2⁸ = 1386939929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1386940185.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5136681 + ... + 5136950.

It is an arithmetic number, because the mean of its divisors is an integer number (154104480).

Almost surely, 2^1386940185 is an apocalyptic number.

1386940185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1386940185 is a deficient number, since it is larger than the sum of its proper divisors (1078731495).

1386940185 is a wasteful number, since it uses less digits than its factorization.

1386940185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10273645 (or 10273639 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1386940185 is about 37241.6458417186. The cubic root of 1386940185 is about 1115.1995285975.

The spelling of 1386940185 in words is "one billion, three hundred eighty-six million, nine hundred forty thousand, one hundred eighty-five".