491968624 has 30 divisors (see below), whose sum is σ = 1108813704. Its totient is φ = 210843360.

The previous prime is 491968621. The next prime is 491968649. The reversal of 491968624 is 426869194.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491968621) 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, 312972 + ... + 314539.

Almost surely, 2^491968624 is an apocalyptic number.

It is an amenable number.

491968624 is an abundant number, since it is smaller than the sum of its proper divisors (616845080).

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

491968624 is a wasteful number, since it uses less digits than its factorization.

491968624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627533 (or 627520 counting only the distinct ones).

The product of its digits is 746496, while the sum is 49.

The square root of 491968624 is about 22180.3657318810. The cubic root of 491968624 is about 789.4278953573.

The spelling of 491968624 in words is "four hundred ninety-one million, nine hundred sixty-eight thousand, six hundred twenty-four".