1440340002 has 64 divisors (see below), whose sum is σ = 3273701760. Its totient is φ = 469297152.

The previous prime is 1440339983. The next prime is 1440340007. The reversal of 1440340002 is 2000430441.

It is a super-2 number, since 2×1440340002² = 4149158642722720008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1440340007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 433098 + ... + 436410.

It is an arithmetic number, because the mean of its divisors is an integer number (51151590).

Almost surely, 2^1440340002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440340002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1636850880).

1440340002 is an abundant number, since it is smaller than the sum of its proper divisors (1833361758).

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

1440340002 is a wasteful number, since it uses less digits than its factorization.

1440340002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3504 (or 3498 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1440340002 is about 37951.8115773147. The cubic root of 1440340002 is about 1129.3321038110.

Adding to 1440340002 its reverse (2000430441), we get a palindrome (3440770443).

The spelling of 1440340002 in words is "one billion, four hundred forty million, three hundred forty thousand, two".