1439216740 has 24 divisors (see below), whose sum is σ = 3254844600. Its totient is φ = 531403008.

The previous prime is 1439216729. The next prime is 1439216759. The reversal of 1439216740 is 476129341.

It can be written as a sum of positive squares in 4 ways, for example, as 9771876 + 1429444864 = 3126^2 + 37808^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1439216740.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2767465 + ... + 2767984.

It is an arithmetic number, because the mean of its divisors is an integer number (135618525).

Almost surely, 2^1439216740 is an apocalyptic number.

1439216740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1439216740 is an abundant number, since it is smaller than the sum of its proper divisors (1815627860).

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

1439216740 is a wasteful number, since it uses less digits than its factorization.

1439216740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5535471 (or 5535469 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1439216740 is about 37937.0101615823. The cubic root of 1439216740 is about 1129.0384542240.

The spelling of 1439216740 in words is "one billion, four hundred thirty-nine million, two hundred sixteen thousand, seven hundred forty".