1440420556 has 6 divisors (see below), whose sum is σ = 2520735980. Its totient is φ = 720210276.

The previous prime is 1440420547. The next prime is 1440420581. The reversal of 1440420556 is 6550240441.

It is a happy number.

It is a super-2 number, since 2×1440420556² = 4149622756294698272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180052566 + ... + 180052573.

Almost surely, 2^1440420556 is an apocalyptic number.

It is an amenable number.

1440420556 is a deficient number, since it is larger than the sum of its proper divisors (1080315424).

1440420556 is a wasteful number, since it uses less digits than its factorization.

1440420556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360105143 (or 360105141 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 1440420556 is about 37952.8728293393. The cubic root of 1440420556 is about 1129.3531568314.

Adding to 1440420556 its reverse (6550240441), we get a palindrome (7990660997).

The spelling of 1440420556 in words is "one billion, four hundred forty million, four hundred twenty thousand, five hundred fifty-six".