623999712 has 144 divisors (see below), whose sum is σ = 1924488720. Its totient is φ = 176504832.

The previous prime is 623999689. The next prime is 623999731. The reversal of 623999712 is 217999326.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 512128 + ... + 513344.

It is an arithmetic number, because the mean of its divisors is an integer number (13364505).

Almost surely, 2^623999712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623999712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (962244360).

623999712 is an abundant number, since it is smaller than the sum of its proper divisors (1300489008).

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

623999712 is a wasteful number, since it uses less digits than its factorization.

623999712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353 (or 1338 counting only the distinct ones).

The product of its digits is 367416, while the sum is 48.

The square root of 623999712 is about 24979.9862289794. The cubic root of 623999712 is about 854.5316048731.

The spelling of 623999712 in words is "six hundred twenty-three million, nine hundred ninety-nine thousand, seven hundred twelve".