331236864 has 300 divisors, whose sum is σ = 1157123484. Its totient is φ = 94058496.

The previous prime is 331236863. The next prime is 331236881. The reversal of 331236864 is 468632133.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331236863) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2032047 + ... + 2032209.

Almost surely, 2^331236864 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 331236864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (578561742).

331236864 is an abundant number, since it is smaller than the sum of its proper divisors (825886620).

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

331236864 is an equidigital number, since it uses as much as digits as its factorization.

331236864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 175 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 331236864 is about 18199.9138459499. The cubic root of 331236864 is about 691.9046055589.

Adding to 331236864 its reverse (468632133), we get a palindrome (799868997).

The spelling of 331236864 in words is "three hundred thirty-one million, two hundred thirty-six thousand, eight hundred sixty-four".