1440816772 has 24 divisors (see below), whose sum is σ = 2580528384. Its totient is φ = 703588032.

The previous prime is 1440816749. The next prime is 1440816809. The reversal of 1440816772 is 2776180441.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83688 + ... + 99424.

It is an arithmetic number, because the mean of its divisors is an integer number (107522016).

Almost surely, 2^1440816772 is an apocalyptic number.

It is an amenable number.

1440816772 is a deficient number, since it is larger than the sum of its proper divisors (1139711612).

1440816772 is a wasteful number, since it uses less digits than its factorization.

1440816772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16275 (or 16273 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 1440816772 is about 37958.0923124437. The cubic root of 1440816772 is about 1129.4566976032.

The spelling of 1440816772 in words is "one billion, four hundred forty million, eight hundred sixteen thousand, seven hundred seventy-two".