239213440 has 64 divisors (see below), whose sum is σ = 576198000. Its totient is φ = 94961664.

The previous prime is 239213423. The next prime is 239213449. The reversal of 239213440 is 44312932.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 239213399 and 239213408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239213449) 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, 87616 + ... + 90304.

Almost surely, 2^239213440 is an apocalyptic number.

239213440 is a gapful number since it is divisible by the number (20) 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 239213440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288099000).

239213440 is an abundant number, since it is smaller than the sum of its proper divisors (336984560).

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

239213440 is a wasteful number, since it uses less digits than its factorization.

239213440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2847 (or 2835 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 239213440 is about 15466.5264361459. The cubic root of 239213440 is about 620.7668624038.

The spelling of 239213440 in words is "two hundred thirty-nine million, two hundred thirteen thousand, four hundred forty".