1439253740 has 48 divisors (see below), whose sum is σ = 3186376704. Its totient is φ = 545265600.

The previous prime is 1439253659. The next prime is 1439253749. The reversal of 1439253740 is 473529341.

It is a junction number, because it is equal to n+sod(n) for n = 1439253694 and 1439253703.

It is not an unprimeable number, because it can be changed into a prime (1439253749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4445 + ... + 53835.

It is an arithmetic number, because the mean of its divisors is an integer number (66382848).

Almost surely, 2^1439253740 is an apocalyptic number.

1439253740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1439253740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1593188352).

1439253740 is an abundant number, since it is smaller than the sum of its proper divisors (1747122964).

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

1439253740 is a wasteful number, since it uses less digits than its factorization.

1439253740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49478 (or 49476 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 1439253740 is about 37937.4978088961. The cubic root of 1439253740 is about 1129.0481294090.

The spelling of 1439253740 in words is "one billion, four hundred thirty-nine million, two hundred fifty-three thousand, seven hundred forty".