1394840 has 16 divisors (see below), whose sum is σ = 3138480. Its totient is φ = 557920.

The previous prime is 1394831. The next prime is 1394849. The reversal of 1394840 is 484931.

It is an interprime number because it is at equal distance from previous prime (1394831) and next prime (1394849).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1394849) 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, 17396 + ... + 17475.

It is an arithmetic number, because the mean of its divisors is an integer number (196155).

2^1394840 is an apocalyptic number.

1394840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1394840 is an abundant number, since it is smaller than the sum of its proper divisors (1743640).

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

1394840 is a wasteful number, since it uses less digits than its factorization.

1394840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34882 (or 34878 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1394840 is about 1181.0334457584. The cubic root of 1394840 is about 111.7312860808.

Subtracting from 1394840 its reverse (484931), we obtain a palindrome (909909).

The spelling of 1394840 in words is "one million, three hundred ninety-four thousand, eight hundred forty".