623450340 has 72 divisors (see below), whose sum is σ = 1912430520. Its totient is φ = 164381184.

The previous prime is 623450327. The next prime is 623450341. The reversal of 623450340 is 43054326.

623450340 is a `hidden beast` number, since 623 + 4 + 5 + 0 + 34 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2842596 + 620607744 = 1686^2 + 24912^2 .

It is a super-2 number, since 2×623450340² = 777380652892231200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (623450341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3439 + ... + 35478.

It is an arithmetic number, because the mean of its divisors is an integer number (26561535).

Almost surely, 2^623450340 is an apocalyptic number.

623450340 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 623450340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (956215260).

623450340 is an abundant number, since it is smaller than the sum of its proper divisors (1288980180).

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

623450340 is a wasteful number, since it uses less digits than its factorization.

623450340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39021 (or 39016 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 623450340 is about 24968.9875645770. The cubic root of 623450340 is about 854.2807534889.

The spelling of 623450340 in words is "six hundred twenty-three million, four hundred fifty thousand, three hundred forty".