44461640 has 32 divisors (see below), whose sum is σ = 103491000. Its totient is φ = 17170944.

The previous prime is 44461621. The next prime is 44461643. The reversal of 44461640 is 4616444.

It can be written as a sum of positive squares in 4 ways, for example, as 35593156 + 8868484 = 5966^2 + 2978^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (44461643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18005 + ... + 20324.

Almost surely, 2^44461640 is an apocalyptic number.

44461640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44461640 is an abundant number, since it is smaller than the sum of its proper divisors (59029360).

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

44461640 is a wasteful number, since it uses less digits than its factorization.

44461640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38369 (or 38365 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 44461640 is about 6667.9562086145. The cubic root of 44461640 is about 354.2651996818.

It can be divided in two parts, 4 and 4461640, that added together give a palindrome (4461644).

The spelling of 44461640 in words is "forty-four million, four hundred sixty-one thousand, six hundred forty".