1440497961 has 24 divisors (see below), whose sum is σ = 2378960064. Its totient is φ = 822797280.

The previous prime is 1440497953. The next prime is 1440498001. The reversal of 1440497961 is 1697940441.

It is not a de Polignac number, because 1440497961 - 2³ = 1440497953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1440497161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289666 + ... + 294596.

It is an arithmetic number, because the mean of its divisors is an integer number (99123336).

Almost surely, 2^1440497961 is an apocalyptic number.

It is an amenable number.

1440497961 is a deficient number, since it is larger than the sum of its proper divisors (938462103).

1440497961 is a wasteful number, since it uses less digits than its factorization.

1440497961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9581 (or 9578 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1440497961 is about 37953.8925671663. The cubic root of 1440497961 is about 1129.3733861121.

The spelling of 1440497961 in words is "one billion, four hundred forty million, four hundred ninety-seven thousand, nine hundred sixty-one".