44445720 has 96 divisors (see below), whose sum is σ = 146608560. Its totient is φ = 10771200.

The previous prime is 44445707. The next prime is 44445743. The reversal of 44445720 is 2754444.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12990 + ... + 16050.

Almost surely, 2^44445720 is an apocalyptic number.

44445720 is a gapful number since it is divisible by the number (40) 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 44445720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73304280).

44445720 is an abundant number, since it is smaller than the sum of its proper divisors (102162840).

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

44445720 is a wasteful number, since it uses less digits than its factorization.

44445720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3097 (or 3082 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 30.

The square root of 44445720 is about 6666.7623326469. The cubic root of 44445720 is about 354.2229117286. Note that the first 3 decimals are identical.

It can be divided in two parts, 444 and 45720, that added together give a palindrome (46164).

The spelling of 44445720 in words is "forty-four million, four hundred forty-five thousand, seven hundred twenty".