438635616 has 48 divisors (see below), whose sum is σ = 1188569088. Its totient is φ = 141494400.

The previous prime is 438635609. The next prime is 438635633. The reversal of 438635616 is 616536834.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70720 + ... + 76671.

It is an arithmetic number, because the mean of its divisors is an integer number (24761856).

Almost surely, 2^438635616 is an apocalyptic number.

It is an amenable number.

438635616 is an abundant number, since it is smaller than the sum of its proper divisors (749933472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

438635616 is a wasteful number, since it uses less digits than its factorization.

438635616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147435 (or 147427 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

The square root of 438635616 is about 20943.6294848816. The cubic root of 438635616 is about 759.8035133793.

The spelling of 438635616 in words is "four hundred thirty-eight million, six hundred thirty-five thousand, six hundred sixteen".