1230390 has 120 divisors (see below), whose sum is σ = 3972672. Its totient is φ = 272160.

The previous prime is 1230379. The next prime is 1230391. The reversal of 1230390 is 930321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230391) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 39675 + ... + 39705.

2^1230390 is an apocalyptic number.

1230390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1230390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1986336).

1230390 is an abundant number, since it is smaller than the sum of its proper divisors (2742282).

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

1230390 is a wasteful number, since it uses less digits than its factorization.

1230390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1230390 is about 1109.2294622845. The cubic root of 1230390 is about 107.1554499484.

The spelling of 1230390 in words is "one million, two hundred thirty thousand, three hundred ninety".