1440287730631 has 4 divisors (see below), whose sum is σ = 1440290130952. Its totient is φ = 1440285330312.

The previous prime is 1440287730589. The next prime is 1440287730641. The reversal of 1440287730631 is 1360377820441.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1440287730631 - 2³⁷ = 1302848777159 is a prime.

It is a super-2 number, since 2×1440287730631² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440287730641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 585361 + ... + 1795333.

It is an arithmetic number, because the mean of its divisors is an integer number (360072532738).

Almost surely, 2^{1440287730631} is an apocalyptic number.

1440287730631 is a deficient number, since it is larger than the sum of its proper divisors (2400321).

1440287730631 is a wasteful number, since it uses less digits than its factorization.

1440287730631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400320.

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 1440287730631 in words is "one trillion, four hundred forty billion, two hundred eighty-seven million, seven hundred thirty thousand, six hundred thirty-one".