438743740 has 12 divisors (see below), whose sum is σ = 921361896. Its totient is φ = 175497488.

The previous prime is 438743717. The next prime is 438743741. The reversal of 438743740 is 47347834.

It is a junction number, because it is equal to n+sod(n) for n = 438743693 and 438743702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438743741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10968574 + ... + 10968613.

It is an arithmetic number, because the mean of its divisors is an integer number (76780158).

Almost surely, 2^438743740 is an apocalyptic number.

It is an amenable number.

438743740 is an abundant number, since it is smaller than the sum of its proper divisors (482618156).

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

438743740 is a wasteful number, since it uses less digits than its factorization.

438743740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21937196 (or 21937194 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 40.

The square root of 438743740 is about 20946.2106358167. The cubic root of 438743740 is about 759.8659389574.

The spelling of 438743740 in words is "four hundred thirty-eight million, seven hundred forty-three thousand, seven hundred forty".