438625641 has 8 divisors (see below), whose sum is σ = 585860704. Its totient is φ = 291903840.

The previous prime is 438625633. The next prime is 438625657. The reversal of 438625641 is 146526834.

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

It is not a de Polignac number, because 438625641 - 2³ = 438625633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 438625641.

It is not an unprimeable number, because it can be changed into a prime (438625601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126316 + ... + 129741.

It is an arithmetic number, because the mean of its divisors is an integer number (73232588).

Almost surely, 2^438625641 is an apocalyptic number.

It is an amenable number.

438625641 is a deficient number, since it is larger than the sum of its proper divisors (147235063).

438625641 is a wasteful number, since it uses less digits than its factorization.

438625641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256631.

The product of its digits is 138240, while the sum is 39.

The square root of 438625641 is about 20943.3913442881. The cubic root of 438625641 is about 759.7977537790.

The spelling of 438625641 in words is "four hundred thirty-eight million, six hundred twenty-five thousand, six hundred forty-one".