1406390 has 8 divisors (see below), whose sum is σ = 2531520. Its totient is φ = 562552.

The previous prime is 1406389. The next prime is 1406417. The reversal of 1406390 is 936041.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70310 + ... + 70329.

It is an arithmetic number, because the mean of its divisors is an integer number (316440).

2^1406390 is an apocalyptic number.

1406390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1406390 is a deficient number, since it is larger than the sum of its proper divisors (1125130).

1406390 is a wasteful number, since it uses less digits than its factorization.

1406390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140646.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1406390 is about 1185.9131502770. The cubic root of 1406390 is about 112.0388364467.

The spelling of 1406390 in words is "one million, four hundred six thousand, three hundred ninety".