438646946 has 32 divisors (see below), whose sum is σ = 695640960. Its totient is φ = 207222400.

The previous prime is 438646933. The next prime is 438646963. The reversal of 438646946 is 649646834.

It is a happy number.

It is a super-2 number, since 2×438646946² = 384822286470253832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 438646894 and 438646903.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342860 + ... + 344136.

It is an arithmetic number, because the mean of its divisors is an integer number (21738780).

Almost surely, 2^438646946 is an apocalyptic number.

438646946 is a deficient number, since it is larger than the sum of its proper divisors (256994014).

438646946 is a wasteful number, since it uses less digits than its factorization.

438646946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450.

The product of its digits is 2985984, while the sum is 50.

The square root of 438646946 is about 20943.8999711133. The cubic root of 438646946 is about 759.8100552555.

The spelling of 438646946 in words is "four hundred thirty-eight million, six hundred forty-six thousand, nine hundred forty-six".