623640000 has 140 divisors (see below), whose sum is σ = 2062296104. Its totient is φ = 166272000.

The previous prime is 623639987. The next prime is 623640001. The reversal of 623640000 is 46326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623640001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 117402 + ... + 122598.

Almost surely, 2^623640000 is an apocalyptic number.

623640000 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 623640000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1031148052).

623640000 is an abundant number, since it is smaller than the sum of its proper divisors (1438656104).

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

623640000 is an equidigital number, since it uses as much as digits as its factorization.

623640000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5232 (or 5207 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 623640000 is about 24972.7851870792. The cubic root of 623640000 is about 854.3673717007.

Adding to 623640000 its reverse (46326), we get a palindrome (623686326).

The spelling of 623640000 in words is "six hundred twenty-three million, six hundred forty thousand".