623650 has 12 divisors (see below), whose sum is σ = 1160082. Its totient is φ = 249440.

The previous prime is 623641. The next prime is 623653. The reversal of 623650 is 56326.

It can be written as a sum of positive squares in 3 ways, for example, as 514089 + 109561 = 717^2 + 331^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (623653) by changing a digit.

623650 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 5 ways as a sum of consecutive naturals, for example, 6187 + ... + 6286.

2⁶²³⁶⁵⁰ is an apocalyptic number.

623650 is a deficient number, since it is larger than the sum of its proper divisors (536432).

623650 is a wasteful number, since it uses less digits than its factorization.

623650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12485 (or 12480 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 623650 is about 789.7151385151. The cubic root of 623650 is about 85.4371938239.

Adding to 623650 its reverse (56326), we get a palindrome (679976).

The spelling of 623650 in words is "six hundred twenty-three thousand, six hundred fifty".