623442560 has 64 divisors (see below), whose sum is σ = 1605086280. Its totient is φ = 230191104.

The previous prime is 623442559. The next prime is 623442569. The reversal of 623442560 is 65244326.

It can be written as a sum of positive squares in 4 ways, for example, as 357361216 + 266081344 = 18904^2 + 16312^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623442569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29147 + ... + 45786.

Almost surely, 2^623442560 is an apocalyptic number.

It is an amenable number.

623442560 is an abundant number, since it is smaller than the sum of its proper divisors (981643720).

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

623442560 is a wasteful number, since it uses less digits than its factorization.

623442560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74965 (or 74953 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 623442560 is about 24968.8317708298. The cubic root of 623442560 is about 854.2771999678.

Adding to 623442560 its reverse (65244326), we get a palindrome (688686886).

The spelling of 623442560 in words is "six hundred twenty-three million, four hundred forty-two thousand, five hundred sixty".