1445244444 has 72 divisors (see below), whose sum is σ = 4329806208. Its totient is φ = 412925040.

The previous prime is 1445244431. The next prime is 1445244473. The reversal of 1445244444 is 4444425441.

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

1445244444 is a modest number, since divided by 44444 gives 14452 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1445244399 and 1445244408.

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, 99402 + ... + 113009.

Almost surely, 2^1445244444 is an apocalyptic number.

1445244444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1445244444 is an abundant number, since it is smaller than the sum of its proper divisors (2884561764).

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

1445244444 is a wasteful number, since it uses less digits than its factorization.

1445244444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212437 (or 212423 counting only the distinct ones).

The product of its digits is 163840, while the sum is 36.

The square root of 1445244444 is about 38016.3707368286. The cubic root of 1445244444 is about 1130.6124656416.

Adding to 1445244444 its reverse (4444425441), we get a palindrome (5889669885).

The spelling of 1445244444 in words is "one billion, four hundred forty-five million, two hundred forty-four thousand, four hundred forty-four".