623940 has 24 divisors (see below), whose sum is σ = 1747200. Its totient is φ = 166368.

The previous prime is 623933. The next prime is 623947. The reversal of 623940 is 49326.

623940 = T₉₄ + T₉₅ + ... + T₁₆₅.

It is an interprime number because it is at equal distance from previous prime (623933) and next prime (623947).

It is a super-2 number, since 2×623940² = 778602247200, which contains 22 as substring.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 623940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5140 + ... + 5259.

It is an arithmetic number, because the mean of its divisors is an integer number (72800).

2⁶²³⁹⁴⁰ is an apocalyptic number.

623940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

623940 is an abundant number, since it is smaller than the sum of its proper divisors (1123260).

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

623940 is a wasteful number, since it uses less digits than its factorization.

623940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10411 (or 10409 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 623940 is about 789.8987276860. The cubic root of 623940 is about 85.4504346624.

The spelling of 623940 in words is "six hundred twenty-three thousand, nine hundred forty".