623428 has 24 divisors (see below), whose sum is σ = 1238720. Its totient is φ = 272160.

The previous prime is 623423. The next prime is 623431. The reversal of 623428 is 824326.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (623423) 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, 673 + ... + 1303.

2⁶²³⁴²⁸ is an apocalyptic number.

It is an amenable number.

623428 is a deficient number, since it is larger than the sum of its proper divisors (615292).

623428 is a wasteful number, since it uses less digits than its factorization.

623428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667 (or 665 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 623428 is about 789.5745689927. The cubic root of 623428 is about 85.4270549597.

The spelling of 623428 in words is "six hundred twenty-three thousand, four hundred twenty-eight".