1491019488 has 240 divisors, whose sum is σ = 5149245024. Its totient is φ = 414305280.

The previous prime is 1491019463. The next prime is 1491019499. The reversal of 1491019488 is 8849101941.

1491019488 is a `hidden beast` number, since 149 + 10 + 19 + 488 = 666.

1491019488 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1491019488² = 4446278227191564288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 670218 + ... + 672438.

Almost surely, 2^1491019488 is an apocalyptic number.

1491019488 is a gapful number since it is divisible by the number (18) 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 1491019488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2574622512).

1491019488 is an abundant number, since it is smaller than the sum of its proper divisors (3658225536).

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

1491019488 is a wasteful number, since it uses less digits than its factorization.

1491019488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287 (or 2270 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 1491019488 is about 38613.7214989698. The cubic root of 1491019488 is about 1142.4251971704.

The spelling of 1491019488 in words is "one billion, four hundred ninety-one million, nineteen thousand, four hundred eighty-eight".