491903424 has 42 divisors (see below), whose sum is σ = 1409954000. Its totient is φ = 163967616.

The previous prime is 491903411. The next prime is 491903429. The reversal of 491903424 is 424309194.

491903424 is a `hidden beast` number, since 49 + 190 + 3 + 424 = 666.

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 (491903429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 426424 + ... + 427575.

Almost surely, 2^491903424 is an apocalyptic number.

It is an amenable number.

491903424 is an abundant number, since it is smaller than the sum of its proper divisors (918050576).

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

491903424 is a wasteful number, since it uses less digits than its factorization.

491903424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854017 (or 854004 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 491903424 is about 22178.8959148105. The cubic root of 491903424 is about 789.3930198454.

The spelling of 491903424 in words is "four hundred ninety-one million, nine hundred three thousand, four hundred twenty-four".