44387818 has 12 divisors (see below), whose sum is σ = 67870278. Its totient is φ = 21772400.

The previous prime is 44387813. The next prime is 44387831. The reversal of 44387818 is 81878344.

It can be written as a sum of positive squares in 3 ways, for example, as 44182609 + 205209 = 6647^2 + 453^2 .

It is a super-2 number, since 2×44387818² = 3940556773602248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (44387813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1668 + ... + 9568.

Almost surely, 2^44387818 is an apocalyptic number.

44387818 is a deficient number, since it is larger than the sum of its proper divisors (23482460).

44387818 is an equidigital number, since it uses as much as digits as its factorization.

44387818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8009 (or 7956 counting only the distinct ones).

The product of its digits is 172032, while the sum is 43.

The square root of 44387818 is about 6662.4183297058. The cubic root of 44387818 is about 354.0690226844.

The spelling of 44387818 in words is "forty-four million, three hundred eighty-seven thousand, eight hundred eighteen".