1440406742 has 16 divisors (see below), whose sum is σ = 2241896400. Its totient is φ = 693258720.

The previous prime is 1440406679. The next prime is 1440406783. The reversal of 1440406742 is 2476040441.

It is a junction number, because it is equal to n+sod(n) for n = 1440406699 and 1440406708.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18317 + ... + 56712.

It is an arithmetic number, because the mean of its divisors is an integer number (140118525).

Almost surely, 2^1440406742 is an apocalyptic number.

1440406742 is a deficient number, since it is larger than the sum of its proper divisors (801489658).

1440406742 is a wasteful number, since it uses less digits than its factorization.

1440406742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75391.

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 1440406742 is about 37952.6908400445. The cubic root of 1440406742 is about 1129.3495465584.

The spelling of 1440406742 in words is "one billion, four hundred forty million, four hundred six thousand, seven hundred forty-two".