1387392 has 32 divisors (see below), whose sum is σ = 3686280. Its totient is φ = 462336.

The previous prime is 1387367. The next prime is 1387403. The reversal of 1387392 is 2937831.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1423 + ... + 2190.

2^1387392 is an apocalyptic number.

1387392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1387392 is an abundant number, since it is smaller than the sum of its proper divisors (2298888).

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

1387392 is an equidigital number, since it uses as much as digits as its factorization.

1387392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630 (or 3618 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 1387392 is about 1177.8760546000. The cubic root of 1387392 is about 111.5320612688.

The spelling of 1387392 in words is "one million, three hundred eighty-seven thousand, three hundred ninety-two".