1623122400 has 144 divisors (see below), whose sum is σ = 5311628784. Its totient is φ = 430510080.

The previous prime is 1623122381. The next prime is 1623122407. The reversal of 1623122400 is 42213261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623122407) 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, 471084 + ... + 474516.

It is an arithmetic number, because the mean of its divisors is an integer number (36886311).

Almost surely, 2^1623122400 is an apocalyptic number.

1623122400 is a gapful number since it is divisible by the number (10) 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 1623122400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2655814392).

1623122400 is an abundant number, since it is smaller than the sum of its proper divisors (3688506384).

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

1623122400 is a wasteful number, since it uses less digits than its factorization.

1623122400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3653 (or 3640 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1623122400 is about 40287.9932486094. The cubic root of 1623122400 is about 1175.2143625802.

Adding to 1623122400 its reverse (42213261), we get a palindrome (1665335661).

The spelling of 1623122400 in words is "one billion, six hundred twenty-three million, one hundred twenty-two thousand, four hundred".