438462661 has 8 divisors (see below), whose sum is σ = 539646464. Its totient is φ = 346915440.

The previous prime is 438462653. The next prime is 438462697. The reversal of 438462661 is 166264834.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 438462661 - 2³ = 438462653 is a prime.

It is the 20940-th Hogben number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438462641) by changing a digit.

It is a nontrivial repunit in base 20939.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2409045 + ... + 2409226.

It is an arithmetic number, because the mean of its divisors is an integer number (67455808).

Almost surely, 2^438462661 is an apocalyptic number.

It is an amenable number.

438462661 is a deficient number, since it is larger than the sum of its proper divisors (101183803).

438462661 is a wasteful number, since it uses less digits than its factorization.

438462661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4818291.

The product of its digits is 165888, while the sum is 40.

The square root of 438462661 is about 20939.5000179087. The cubic root of 438462661 is about 759.7036361785.

The spelling of 438462661 in words is "four hundred thirty-eight million, four hundred sixty-two thousand, six hundred sixty-one".