1491908968 has 64 divisors (see below), whose sum is σ = 3201120000. Its totient is φ = 645707520.

The previous prime is 1491908939. The next prime is 1491908993. The reversal of 1491908968 is 8698091941.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148158 + ... + 157906.

It is an arithmetic number, because the mean of its divisors is an integer number (50017500).

Almost surely, 2^1491908968 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 1491908968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1600560000).

1491908968 is an abundant number, since it is smaller than the sum of its proper divisors (1709211032).

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

1491908968 is a wasteful number, since it uses less digits than its factorization.

1491908968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9850 (or 9846 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 55.

The square root of 1491908968 is about 38625.2374491083. The cubic root of 1491908968 is about 1142.6523264092.

The spelling of 1491908968 in words is "one billion, four hundred ninety-one million, nine hundred eight thousand, nine hundred sixty-eight".