438632146 has 4 divisors (see below), whose sum is σ = 657948222. Its totient is φ = 219316072.

The previous prime is 438632143. The next prime is 438632191. The reversal of 438632146 is 641236834.

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., 336318921 + 102313225 = 18339^2 + 10115^2 .

It is not an unprimeable number, because it can be changed into a prime (438632143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109658035 + ... + 109658038.

Almost surely, 2^438632146 is an apocalyptic number.

438632146 is a deficient number, since it is larger than the sum of its proper divisors (219316076).

438632146 is a wasteful number, since it uses less digits than its factorization.

438632146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219316075.

The product of its digits is 82944, while the sum is 37.

The square root of 438632146 is about 20943.5466432980. The cubic root of 438632146 is about 759.8015097989.

The spelling of 438632146 in words is "four hundred thirty-eight million, six hundred thirty-two thousand, one hundred forty-six".