1491981192 has 192 divisors, whose sum is σ = 4542982080. Its totient is φ = 439312896.

The previous prime is 1491981163. The next prime is 1491981223. The reversal of 1491981192 is 2911891941.

It is a happy number.

1491981192 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2320023 + ... + 2320665.

It is an arithmetic number, because the mean of its divisors is an integer number (23661365).

Almost surely, 2^1491981192 is an apocalyptic number.

1491981192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1491981192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2271491040).

1491981192 is an abundant number, since it is smaller than the sum of its proper divisors (3051000888).

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

1491981192 is a wasteful number, since it uses less digits than its factorization.

1491981192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772 (or 765 counting only the distinct ones).

The product of its digits is 46656, while the sum is 45.

The square root of 1491981192 is about 38626.1723705572. The cubic root of 1491981192 is about 1142.6707648868.

The spelling of 1491981192 in words is "one billion, four hundred ninety-one million, nine hundred eighty-one thousand, one hundred ninety-two".