438253920 has 288 divisors, whose sum is σ = 1652755104. Its totient is φ = 105062400.

The previous prime is 438253909. The next prime is 438253927. The reversal of 438253920 is 29352834.

438253920 is a `hidden beast` number, since 43 + 82 + 539 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438253927) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 767235 + ... + 767805.

It is an arithmetic number, because the mean of its divisors is an integer number (5738733).

Almost surely, 2^438253920 is an apocalyptic number.

438253920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438253920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (826377552).

438253920 is an abundant number, since it is smaller than the sum of its proper divisors (1214501184).

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

438253920 is a wasteful number, since it uses less digits than its factorization.

438253920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 438253920 is about 20934.5150409557. The cubic root of 438253920 is about 759.5830584700.

The spelling of 438253920 in words is "four hundred thirty-eight million, two hundred fifty-three thousand, nine hundred twenty".