623390 has 32 divisors (see below), whose sum is σ = 1257120. Its totient is φ = 221184.

The previous prime is 623387. The next prime is 623393. The reversal of 623390 is 93326.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (623387) and next prime (623393).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623393) 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, 3134 + ... + 3326.

It is an arithmetic number, because the mean of its divisors is an integer number (39285).

2⁶²³³⁹⁰ is an apocalyptic number.

623390 is an abundant number, since it is smaller than the sum of its proper divisors (633730).

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

623390 is a wasteful number, since it uses less digits than its factorization.

623390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 623390 is about 789.5505050344. The cubic root of 623390 is about 85.4253192372.

The spelling of 623390 in words is "six hundred twenty-three thousand, three hundred ninety".