438660946 has 4 divisors (see below), whose sum is σ = 657991422. Its totient is φ = 219330472.

The previous prime is 438660883. The next prime is 438660949. The reversal of 438660946 is 649066834.

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

It can be written as a sum of positive squares in only one way, i.e., 432848025 + 5812921 = 20805^2 + 2411^2 .

It is a super-2 number, since 2×438660946² = 384846851091229832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 438660896 and 438660905.

It is not an unprimeable number, because it can be changed into a prime (438660949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109665235 + ... + 109665238.

Almost surely, 2^438660946 is an apocalyptic number.

438660946 is a deficient number, since it is larger than the sum of its proper divisors (219330476).

438660946 is a wasteful number, since it uses less digits than its factorization.

438660946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219330475.

The product of its (nonzero) digits is 746496, while the sum is 46.

The square root of 438660946 is about 20944.2341946417. The cubic root of 438660946 is about 759.8181386186.

The spelling of 438660946 in words is "four hundred thirty-eight million, six hundred sixty thousand, nine hundred forty-six".