72438 has 8 divisors (see below), whose sum is σ = 144888. Its totient is φ = 24144.

The previous prime is 72431. The next prime is 72461. The reversal of 72438 is 83427.

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

72438 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72431) 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, 6031 + ... + 6042.

It is an arithmetic number, because the mean of its divisors is an integer number (18111).

2⁷²⁴³⁸ is an apocalyptic number.

72438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72444).

72438 is a wasteful number, since it uses less digits than its factorization.

72438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12078.

The product of its digits is 1344, while the sum is 24.

The square root of 72438 is about 269.1430846223. The cubic root of 72438 is about 41.6858649307.

The spelling of 72438 in words is "seventy-two thousand, four hundred thirty-eight".