1386091044 has 144 divisors (see below), whose sum is σ = 4003743744. Its totient is φ = 401068800.

The previous prime is 1386091043. The next prime is 1386091079. The reversal of 1386091044 is 4401906831.

1386091044 is a `hidden beast` number, since 1 + 3 + 8 + 609 + 1 + 0 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1386091043) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 655549 + ... + 657659.

It is an arithmetic number, because the mean of its divisors is an integer number (27803776).

Almost surely, 2^1386091044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1386091044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2001871872).

1386091044 is an abundant number, since it is smaller than the sum of its proper divisors (2617652700).

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

1386091044 is a wasteful number, since it uses less digits than its factorization.

1386091044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218 (or 2213 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1386091044 is about 37230.2436736587. The cubic root of 1386091044 is about 1114.9718920167.

Adding to 1386091044 its reverse (4401906831), we get a palindrome (5787997875).

The spelling of 1386091044 in words is "one billion, three hundred eighty-six million, ninety-one thousand, forty-four".