623040 has 112 divisors (see below), whose sum is σ = 2194560. Its totient is φ = 148480.

The previous prime is 623023. The next prime is 623041. The reversal of 623040 is 40326.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623041) by changing a digit.

623040 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10531 + ... + 10589.

2⁶²³⁰⁴⁰ is an apocalyptic number.

623040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1097280).

623040 is an abundant number, since it is smaller than the sum of its proper divisors (1571520).

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

623040 is a wasteful number, since it uses less digits than its factorization.

623040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 623040 is about 789.3288288160. The cubic root of 623040 is about 85.4093290015.

Adding to 623040 its reverse (40326), we get a palindrome (663366).

The spelling of 623040 in words is "six hundred twenty-three thousand, forty".