623398 has 8 divisors (see below), whose sum is σ = 938808. Its totient is φ = 310464.

The previous prime is 623393. The next prime is 623401. The reversal of 623398 is 893326.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265 + ... + 1147.

It is an arithmetic number, because the mean of its divisors is an integer number (117351).

2⁶²³³⁹⁸ is an apocalyptic number.

623398 is a deficient number, since it is larger than the sum of its proper divisors (315410).

623398 is a wasteful number, since it uses less digits than its factorization.

623398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238.

The product of its digits is 7776, while the sum is 31.

The square root of 623398 is about 789.5555711918. Note that the first 4 decimals coincide. The cubic root of 623398 is about 85.4256846583.

The spelling of 623398 in words is "six hundred twenty-three thousand, three hundred ninety-eight".