1438408764 has 72 divisors (see below), whose sum is σ = 3989617632. Its totient is φ = 434229120.

The previous prime is 1438408757. The next prime is 1438408793. The reversal of 1438408764 is 4678048341.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4192 + ... + 53799.

It is an arithmetic number, because the mean of its divisors is an integer number (55411356).

Almost surely, 2^1438408764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1438408764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1994808816).

1438408764 is an abundant number, since it is smaller than the sum of its proper divisors (2551208868).

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

1438408764 is a wasteful number, since it uses less digits than its factorization.

1438408764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58067 (or 58062 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The square root of 1438408764 is about 37926.3597514974. The cubic root of 1438408764 is about 1128.8271340172.

The spelling of 1438408764 in words is "one billion, four hundred thirty-eight million, four hundred eight thousand, seven hundred sixty-four".