438680261 has 4 divisors (see below), whose sum is σ = 439099500. Its totient is φ = 438261024.

The previous prime is 438680243. The next prime is 438680267. The reversal of 438680261 is 162086834.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 177049636 + 261630625 = 13306^2 + 16175^2 .

It is a cyclic number.

It is not a de Polignac number, because 438680261 - 2¹⁴ = 438663877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438680267) 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, 208046 + ... + 210143.

It is an arithmetic number, because the mean of its divisors is an integer number (109774875).

Almost surely, 2^438680261 is an apocalyptic number.

It is an amenable number.

438680261 is a deficient number, since it is larger than the sum of its proper divisors (419239).

438680261 is a wasteful number, since it uses less digits than its factorization.

438680261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419238.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 438680261 is about 20944.6952949906. The cubic root of 438680261 is about 759.8292904904.

The spelling of 438680261 in words is "four hundred thirty-eight million, six hundred eighty thousand, two hundred sixty-one".