438947793 has 6 divisors (see below), whose sum is σ = 634035714. Its totient is φ = 292631856.

The previous prime is 438947791. The next prime is 438947797. The reversal of 438947793 is 397749834.

438947793 is a `hidden beast` number, since 4 + 3 + 89 + 477 + 93 = 666.

It can be written as a sum of positive squares in only one way, i.e., 438357969 + 589824 = 20937^2 + 768^2 .

It is not a de Polignac number, because 438947793 - 2¹ = 438947791 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (438947791) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24385980 + ... + 24385997.

It is an arithmetic number, because the mean of its divisors is an integer number (105672619).

Almost surely, 2^438947793 is an apocalyptic number.

It is an amenable number.

438947793 is a deficient number, since it is larger than the sum of its proper divisors (195087921).

438947793 is a wasteful number, since it uses less digits than its factorization.

438947793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48771983 (or 48771980 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The square root of 438947793 is about 20951.0809506335. The cubic root of 438947793 is about 759.9837213734.

The spelling of 438947793 in words is "four hundred thirty-eight million, nine hundred forty-seven thousand, seven hundred ninety-three".