1393890 has 32 divisors (see below), whose sum is σ = 3386880. Its totient is φ = 367104.

The previous prime is 1393883. The next prime is 1393891. The reversal of 1393890 is 983931.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1393891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2671 + ... + 3149.

It is an arithmetic number, because the mean of its divisors is an integer number (105840).

2^1393890 is an apocalyptic number.

1393890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1393890 is an abundant number, since it is smaller than the sum of its proper divisors (1992990).

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

1393890 is a wasteful number, since it uses less digits than its factorization.

1393890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 1393890 is about 1180.6311871198. The cubic root of 1393890 is about 111.7059142751.

It can be divided in two parts, 13938 and 90, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 1393890 in words is "one million, three hundred ninety-three thousand, eight hundred ninety".