491955924 has 48 divisors (see below), whose sum is σ = 1218147840. Its totient is φ = 154191840.

The previous prime is 491955907. The next prime is 491955929. The reversal of 491955924 is 429559194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491955929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1179 + ... + 31389.

It is an arithmetic number, because the mean of its divisors is an integer number (25378080).

Almost surely, 2^491955924 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 491955924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (609073920).

491955924 is an abundant number, since it is smaller than the sum of its proper divisors (726191916).

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

491955924 is a wasteful number, since it uses less digits than its factorization.

491955924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30300 (or 30298 counting only the distinct ones).

The product of its digits is 583200, while the sum is 48.

The square root of 491955924 is about 22180.0794407955. The cubic root of 491955924 is about 789.4211023627.

The spelling of 491955924 in words is "four hundred ninety-one million, nine hundred fifty-five thousand, nine hundred twenty-four".