1340390 has 8 divisors (see below), whose sum is σ = 2412720. Its totient is φ = 536152.

The previous prime is 1340387. The next prime is 1340401. The reversal of 1340390 is 930431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67010 + ... + 67029.

It is an arithmetic number, because the mean of its divisors is an integer number (301590).

2^1340390 is an apocalyptic number.

1340390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1340390 is a deficient number, since it is larger than the sum of its proper divisors (1072330).

1340390 is a wasteful number, since it uses less digits than its factorization.

1340390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134046.

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

The square root of 1340390 is about 1157.7521323669. The cubic root of 1340390 is about 110.2580717486.

The spelling of 1340390 in words is "one million, three hundred forty thousand, three hundred ninety".