1623444480 has 396 divisors, whose sum is σ = 6552692640. Its totient is φ = 370556928.

The previous prime is 1623444479. The next prime is 1623444481. The reversal of 1623444480 is 844443261.

It is an interprime number because it is at equal distance from previous prime (1623444479) and next prime (1623444481).

It is a super-3 number, since 3×1623444480³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623444481) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2257561 + ... + 2258279.

Almost surely, 2^1623444480 is an apocalyptic number.

1623444480 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 1623444480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3276346320).

1623444480 is an abundant number, since it is smaller than the sum of its proper divisors (4929248160).

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

1623444480 is a wasteful number, since it uses less digits than its factorization.

1623444480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 736 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 36.

The square root of 1623444480 is about 40291.9902710204. The cubic root of 1623444480 is about 1175.2920909569.

The spelling of 1623444480 in words is "one billion, six hundred twenty-three million, four hundred forty-four thousand, four hundred eighty".