1440445556 has 48 divisors (see below), whose sum is σ = 2921909760. Its totient is φ = 614452320.

The previous prime is 1440445543. The next prime is 1440445561. The reversal of 1440445556 is 6555440441.

It is a happy number.

It is a super-3 number, since 3×1440445556³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81401 + ... + 97503.

It is an arithmetic number, because the mean of its divisors is an integer number (60873120).

Almost surely, 2^1440445556 is an apocalyptic number.

It is an amenable number.

1440445556 is an abundant number, since it is smaller than the sum of its proper divisors (1481464204).

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

1440445556 is a wasteful number, since it uses less digits than its factorization.

1440445556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16244 (or 16242 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 38.

The square root of 1440445556 is about 37953.2021837420. The cubic root of 1440445556 is about 1129.3596904940.

Adding to 1440445556 its reverse (6555440441), we get a palindrome (7995885997).

The spelling of 1440445556 in words is "one billion, four hundred forty million, four hundred forty-five thousand, five hundred fifty-six".