1382840 has 32 divisors (see below), whose sum is σ = 3144960. Its totient is φ = 547200.

The previous prime is 1382827. The next prime is 1382861. The reversal of 1382840 is 482831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7145 + ... + 7335.

It is an arithmetic number, because the mean of its divisors is an integer number (98280).

2^1382840 is an apocalyptic number.

1382840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1382840 is an abundant number, since it is smaller than the sum of its proper divisors (1762120).

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

1382840 is a wasteful number, since it uses less digits than its factorization.

1382840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 1382840 is about 1175.9421754491. The cubic root of 1382840 is about 111.4099496135.

Subtracting from 1382840 its reverse (482831), we obtain a palindrome (900009).

It can be divided in two parts, 1382 and 840, that added together give a palindrome (2222).

The spelling of 1382840 in words is "one million, three hundred eighty-two thousand, eight hundred forty".