440021132 has 12 divisors (see below), whose sum is σ = 815333400. Its totient is φ = 207068736.

The previous prime is 440021123. The next prime is 440021159. The reversal of 440021132 is 231120044.

It is a super-2 number, since 2×440021132² = 387237193213122848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 440021132.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3235382 + ... + 3235517.

It is an arithmetic number, because the mean of its divisors is an integer number (67944450).

Almost surely, 2^440021132 is an apocalyptic number.

It is an amenable number.

440021132 is a deficient number, since it is larger than the sum of its proper divisors (375312268).

440021132 is a wasteful number, since it uses less digits than its factorization.

440021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6470920 (or 6470918 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 440021132 is about 20976.6806716411. The cubic root of 440021132 is about 760.6026683197.

Adding to 440021132 its reverse (231120044), we get a palindrome (671141176).

The spelling of 440021132 in words is "four hundred forty million, twenty-one thousand, one hundred thirty-two".