331403424 has 48 divisors (see below), whose sum is σ = 949021920. Its totient is φ = 100424960.

The previous prime is 331403419. The next prime is 331403437. The reversal of 331403424 is 424304133.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 331403394 and 331403403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155859 + ... + 157970.

It is an arithmetic number, because the mean of its divisors is an integer number (19771290).

Almost surely, 2^331403424 is an apocalyptic number.

It is an amenable number.

331403424 is an abundant number, since it is smaller than the sum of its proper divisors (617618496).

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

331403424 is a wasteful number, since it uses less digits than its factorization.

331403424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313853 (or 313845 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 331403424 is about 18204.4891166987. The cubic root of 331403424 is about 692.0205591584.

Adding to 331403424 its reverse (424304133), we get a palindrome (755707557).

The spelling of 331403424 in words is "three hundred thirty-one million, four hundred three thousand, four hundred twenty-four".