623434320 has 400 divisors, whose sum is σ = 2333422080. Its totient is φ = 153888768.

The previous prime is 623434313. The next prime is 623434333. The reversal of 623434320 is 23434326.

It is a happy number.

623434320 is a `hidden beast` number, since 623 + 4 + 3 + 4 + 32 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7004836 + ... + 7004924.

Almost surely, 2^623434320 is an apocalyptic number.

623434320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623434320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1166711040).

623434320 is an abundant number, since it is smaller than the sum of its proper divisors (1709987760).

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

623434320 is a wasteful number, since it uses less digits than its factorization.

623434320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

The square root of 623434320 is about 24968.6667645671. Note that the first 3 decimals coincide. The cubic root of 623434320 is about 854.2734363090.

Adding to 623434320 its reverse (23434326), we get a palindrome (646868646).

The spelling of 623434320 in words is "six hundred twenty-three million, four hundred thirty-four thousand, three hundred twenty".