44447778 has 40 divisors (see below), whose sum is σ = 103041180. Its totient is φ = 14303520.

The previous prime is 44447773. The next prime is 44447791. The reversal of 44447778 is 87774444.

It can be written as a sum of positive squares in 2 ways, for example, as 43520409 + 927369 = 6597^2 + 963^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (44447771) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33 + ... + 9428.

Almost surely, 2^44447778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44447778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51520590).

44447778 is an abundant number, since it is smaller than the sum of its proper divisors (58593402).

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

44447778 is a wasteful number, since it uses less digits than its factorization.

44447778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9504 (or 9495 counting only the distinct ones).

The product of its digits is 702464, while the sum is 45.

The square root of 44447778 is about 6666.9166786454. The cubic root of 44447778 is about 354.2283789179.

The spelling of 44447778 in words is "forty-four million, four hundred forty-seven thousand, seven hundred seventy-eight".