1408387 has 4 divisors (see below), whose sum is σ = 1413856. Its totient is φ = 1402920.

The previous prime is 1408373. The next prime is 1408397. The reversal of 1408387 is 7838041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1408387 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1408367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2328 + ... + 2869.

It is an arithmetic number, because the mean of its divisors is an integer number (353464).

2^1408387 is an apocalyptic number.

1408387 is a deficient number, since it is larger than the sum of its proper divisors (5469).

1408387 is an equidigital number, since it uses as much as digits as its factorization.

1408387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5468.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 1408387 is about 1186.7548188232. The cubic root of 1408387 is about 112.0918411229.

It can be divided in two parts, 14083 and 87, that multiplied together give a palindrome (1225221).

The spelling of 1408387 in words is "one million, four hundred eight thousand, three hundred eighty-seven".