623970 has 32 divisors (see below), whose sum is σ = 1664640. Its totient is φ = 166320.

The previous prime is 623963. The next prime is 623977. The reversal of 623970 is 79326.

It is an interprime number because it is at equal distance from previous prime (623963) and next prime (623977).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (623977) 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, 886 + ... + 1425.

It is an arithmetic number, because the mean of its divisors is an integer number (52020).

2⁶²³⁹⁷⁰ is an apocalyptic number.

623970 is an abundant number, since it is smaller than the sum of its proper divisors (1040670).

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

623970 is a wasteful number, since it uses less digits than its factorization.

623970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327 (or 2321 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 623970 is about 789.9177172339. The cubic root of 623970 is about 85.4518041701.

Subtracting from 623970 its reverse (79326), we obtain a square (544644 = 738²).

The spelling of 623970 in words is "six hundred twenty-three thousand, nine hundred seventy".