438009629 has 4 divisors (see below), whose sum is σ = 442346460. Its totient is φ = 433672800.

The previous prime is 438009613. The next prime is 438009643. The reversal of 438009629 is 926900834.

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 406627225 + 31382404 = 20165^2 + 5602^2 .

It is a cyclic number.

It is not a de Polignac number, because 438009629 - 2⁴ = 438009613 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 (438009329) 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, 2168264 + ... + 2168465.

It is an arithmetic number, because the mean of its divisors is an integer number (110586615).

Almost surely, 2^438009629 is an apocalyptic number.

It is an amenable number.

438009629 is a deficient number, since it is larger than the sum of its proper divisors (4336831).

438009629 is a wasteful number, since it uses less digits than its factorization.

438009629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4336830.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 438009629 is about 20928.6795809005. The cubic root of 438009629 is about 759.4418969308.

The spelling of 438009629 in words is "four hundred thirty-eight million, nine thousand, six hundred twenty-nine".