623463444 has 72 divisors (see below), whose sum is σ = 1636427520. Its totient is φ = 199929600.

The previous prime is 623463409. The next prime is 623463469. The reversal of 623463444 is 444364326.

It is a super-2 number, since 2×623463444² = 777413332008682272, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 623463399 and 623463408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198204 + ... + 201324.

It is an arithmetic number, because the mean of its divisors is an integer number (22728160).

Almost surely, 2^623463444 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 623463444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (818213760).

623463444 is an abundant number, since it is smaller than the sum of its proper divisors (1012964076).

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

623463444 is a wasteful number, since it uses less digits than its factorization.

623463444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3341 (or 3336 counting only the distinct ones).

The product of its digits is 165888, while the sum is 36.

The square root of 623463444 is about 24969.2499687115. The cubic root of 623463444 is about 854.2867386844.

The spelling of 623463444 in words is "six hundred twenty-three million, four hundred sixty-three thousand, four hundred forty-four".