1387386 has 108 divisors (see below), whose sum is σ = 4139226. Its totient is φ = 332640.

The previous prime is 1387367. The next prime is 1387403. The reversal of 1387386 is 6837831.

It can be written as a sum of positive squares in only one way, i.e., 1334025 + 53361 = 1155^2 + 231^2 .

Its product of digits (24192) is a multiple of the sum of its prime divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1387386.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 106716 + ... + 106728.

2^1387386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1387386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2069613).

1387386 is an abundant number, since it is smaller than the sum of its proper divisors (2751840).

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

1387386 is a wasteful number, since it uses less digits than its factorization.

1387386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57 (or 36 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1387386 is about 1177.8735076399. The cubic root of 1387386 is about 111.5319004891.

The spelling of 1387386 in words is "one million, three hundred eighty-seven thousand, three hundred eighty-six".