438655672 has 64 divisors (see below), whose sum is σ = 1018180800. Its totient is φ = 172523520.

The previous prime is 438655663. The next prime is 438655681. The reversal of 438655672 is 276556834.

It is an interprime number because it is at equal distance from previous prime (438655663) and next prime (438655681).

It is a congruent number.

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, 130104 + ... + 133432.

It is an arithmetic number, because the mean of its divisors is an integer number (15909075).

Almost surely, 2^438655672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438655672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (509090400).

438655672 is an abundant number, since it is smaller than the sum of its proper divisors (579525128).

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

438655672 is a wasteful number, since it uses less digits than its factorization.

438655672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536 (or 3532 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 46.

The square root of 438655672 is about 20944.1082884901. The cubic root of 438655672 is about 759.8150935204.

The spelling of 438655672 in words is "four hundred thirty-eight million, six hundred fifty-five thousand, six hundred seventy-two".