444630780 has 288 divisors, whose sum is σ = 1585059840. Its totient is φ = 99740160.

The previous prime is 444630757. The next prime is 444630787. The reversal of 444630780 is 87036444.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444630787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1993749 + ... + 1993971.

It is an arithmetic number, because the mean of its divisors is an integer number (5503680).

Almost surely, 2^444630780 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 444630780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (792529920).

444630780 is an abundant number, since it is smaller than the sum of its proper divisors (1140429060).

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

444630780 is a wasteful number, since it uses less digits than its factorization.

444630780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 444630780 is about 21086.2699404138. The cubic root of 444630780 is about 763.2494639499.

The spelling of 444630780 in words is "four hundred forty-four million, six hundred thirty thousand, seven hundred eighty".