438402481 has 12 divisors (see below), whose sum is σ = 483707700. Its totient is φ = 397036640.

The previous prime is 438402439. The next prime is 438402487. The reversal of 438402481 is 184204834.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 135955600 + 302446881 = 11660^2 + 17391^2 .

It is not a de Polignac number, because 438402481 - 2⁷ = 438402353 is a prime.

It is a super-2 number, since 2×438402481² = 384393470693910722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438402487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25815 + ... + 39283.

It is an arithmetic number, because the mean of its divisors is an integer number (40308975).

Almost surely, 2^438402481 is an apocalyptic number.

It is an amenable number.

438402481 is a deficient number, since it is larger than the sum of its proper divisors (45305219).

438402481 is a wasteful number, since it uses less digits than its factorization.

438402481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13760 (or 13749 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 438402481 is about 20938.0629715358. The cubic root of 438402481 is about 759.6688775695.

The spelling of 438402481 in words is "four hundred thirty-eight million, four hundred two thousand, four hundred eighty-one".