1438971732 has 72 divisors (see below), whose sum is σ = 4201509312. Its totient is φ = 410400000.

The previous prime is 1438971713. The next prime is 1438971739. The reversal of 1438971732 is 2371798341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438971739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100144 + ... + 113607.

It is an arithmetic number, because the mean of its divisors is an integer number (58354296).

Almost surely, 2^1438971732 is an apocalyptic number.

1438971732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1438971732 is an abundant number, since it is smaller than the sum of its proper divisors (2762537580).

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

1438971732 is a wasteful number, since it uses less digits than its factorization.

1438971732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213789 (or 213784 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 1438971732 is about 37933.7808819527. The cubic root of 1438971732 is about 1128.9743825326.

The spelling of 1438971732 in words is "one billion, four hundred thirty-eight million, nine hundred seventy-one thousand, seven hundred thirty-two".