1340408 has 16 divisors (see below), whose sum is σ = 2533680. Its totient is φ = 664768.

The previous prime is 1340407. The next prime is 1340411. The reversal of 1340408 is 8040431.

It is a self number, because there is not a number n which added to its sum of digits gives 1340408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340401) 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, 485 + ... + 1707.

It is an arithmetic number, because the mean of its divisors is an integer number (158355).

2^1340408 is an apocalyptic number.

It is an amenable number.

1340408 is a deficient number, since it is larger than the sum of its proper divisors (1193272).

1340408 is a wasteful number, since it uses less digits than its factorization.

1340408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366 (or 1362 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1340408 is about 1157.7599060254. The cubic root of 1340408 is about 110.2585652956.

Adding to 1340408 its reverse (8040431), we get a palindrome (9380839).

The spelling of 1340408 in words is "one million, three hundred forty thousand, four hundred eight".