1440531156 has 48 divisors (see below), whose sum is σ = 3410817984. Its totient is φ = 473143296.

The previous prime is 1440531077. The next prime is 1440531173. The reversal of 1440531156 is 6511350441.

It is a happy number.

It is a super-2 number, since 2×1440531156² = 4150260022813392672, which contains 22 as substring.

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, 244906 + ... + 250718.

It is an arithmetic number, because the mean of its divisors is an integer number (71058708).

Almost surely, 2^1440531156 is an apocalyptic number.

It is an amenable number.

1440531156 is an abundant number, since it is smaller than the sum of its proper divisors (1970286828).

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

1440531156 is a wasteful number, since it uses less digits than its factorization.

1440531156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6120 (or 6118 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1440531156 is about 37954.3298715706. The cubic root of 1440531156 is about 1129.3820611820.

Adding to 1440531156 its reverse (6511350441), we get a palindrome (7951881597).

The spelling of 1440531156 in words is "one billion, four hundred forty million, five hundred thirty-one thousand, one hundred fifty-six".