440001252 has 18 divisors (see below), whose sum is σ = 1112225478. Its totient is φ = 146667072.

The previous prime is 440001239. The next prime is 440001269. The reversal of 440001252 is 252100044.

It can be written as a sum of positive squares in only one way, i.e., 388247616 + 51753636 = 19704^2 + 7194^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×440001252² = 387202203523135008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6111093 + ... + 6111164.

Almost surely, 2^440001252 is an apocalyptic number.

It is an amenable number.

440001252 is an abundant number, since it is smaller than the sum of its proper divisors (672224226).

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

440001252 is a wasteful number, since it uses less digits than its factorization.

440001252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12222267 (or 12222262 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 440001252 is about 20976.2068067608. The cubic root of 440001252 is about 760.5912135602.

Adding to 440001252 its reverse (252100044), we get a palindrome (692101296).

The spelling of 440001252 in words is "four hundred forty million, one thousand, two hundred fifty-two".