1390340 has 24 divisors (see below), whose sum is σ = 3337152. Its totient is φ = 476640.

The previous prime is 1390339. The next prime is 1390343. The reversal of 1390340 is 430931.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1390343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4826 + ... + 5105.

It is an arithmetic number, because the mean of its divisors is an integer number (139048).

2^1390340 is an apocalyptic number.

1390340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1390340 is an abundant number, since it is smaller than the sum of its proper divisors (1946812).

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

1390340 is a wasteful number, since it uses less digits than its factorization.

1390340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9947 (or 9945 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1390340 is about 1179.1267955568. The cubic root of 1390340 is about 111.6110016860.

The spelling of 1390340 in words is "one million, three hundred ninety thousand, three hundred forty".