623445 has 16 divisors (see below), whose sum is σ = 1010880. Its totient is φ = 328064.

The previous prime is 623437. The next prime is 623477. The reversal of 623445 is 544326.

It is a cyclic number.

It is not a de Polignac number, because 623445 - 2³ = 623437 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1102 + ... + 1568.

It is an arithmetic number, because the mean of its divisors is an integer number (63180).

2⁶²³⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

623445 is a deficient number, since it is larger than the sum of its proper divisors (387435).

623445 is a wasteful number, since it uses less digits than its factorization.

623445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564.

The product of its digits is 2880, while the sum is 24.

The square root of 623445 is about 789.5853342103. The cubic root of 623445 is about 85.4278314443.

The spelling of 623445 in words is "six hundred twenty-three thousand, four hundred forty-five".