1386891572 has 24 divisors (see below), whose sum is σ = 2719264800. Its totient is φ = 613366560.

The previous prime is 1386891509. The next prime is 1386891577. The reversal of 1386891572 is 2751986831.

It is a self number, because there is not a number n which added to its sum of digits gives 1386891572.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386891577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424322 + ... + 427577.

It is an arithmetic number, because the mean of its divisors is an integer number (113302700).

Almost surely, 2^1386891572 is an apocalyptic number.

It is an amenable number.

1386891572 is a deficient number, since it is larger than the sum of its proper divisors (1332373228).

1386891572 is a wasteful number, since it uses less digits than its factorization.

1386891572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851951 (or 851949 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 1386891572 is about 37240.9931661335. The cubic root of 1386891572 is about 1115.1864989974.

The spelling of 1386891572 in words is "one billion, three hundred eighty-six million, eight hundred ninety-one thousand, five hundred seventy-two".