1993390 has 16 divisors (see below), whose sum is σ = 4100832. Its totient is φ = 683424.

The previous prime is 1993367. The next prime is 1993417. The reversal of 1993390 is 933991.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 14169 + ... + 14308.

It is an arithmetic number, because the mean of its divisors is an integer number (256302).

2^1993390 is an apocalyptic number.

1993390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1993390 is an abundant number, since it is smaller than the sum of its proper divisors (2107442).

1993390 is a wasteful number, since it uses less digits than its factorization.

1993390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28491.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 1993390 is about 1411.8746403275. The cubic root of 1993390 is about 125.8531504930.

The spelling of 1993390 in words is "one million, nine hundred ninety-three thousand, three hundred ninety".