1440431004 has 24 divisors (see below), whose sum is σ = 3392419968. Its totient is φ = 475655920.

The previous prime is 1440430991. The next prime is 1440431011. The reversal of 1440431004 is 4001340441.

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, 559632 + ... + 562199.

It is an arithmetic number, because the mean of its divisors is an integer number (141350832).

Almost surely, 2^1440431004 is an apocalyptic number.

It is an amenable number.

1440431004 is an abundant number, since it is smaller than the sum of its proper divisors (1951988964).

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

1440431004 is a wasteful number, since it uses less digits than its factorization.

1440431004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121945 (or 1121943 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1440431004 is about 37953.0104734789. The cubic root of 1440431004 is about 1129.3558873888.

Adding to 1440431004 its reverse (4001340441), we get a palindrome (5441771445).

The spelling of 1440431004 in words is "one billion, four hundred forty million, four hundred thirty-one thousand, four".