1491535892 has 72 divisors (see below), whose sum is σ = 3335320800. Its totient is φ = 577093440.

The previous prime is 1491535841. The next prime is 1491535907. The reversal of 1491535892 is 2985351941.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 318923 + ... + 323565.

It is an arithmetic number, because the mean of its divisors is an integer number (46323900).

Almost surely, 2^1491535892 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 1491535892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1667660400).

1491535892 is an abundant number, since it is smaller than the sum of its proper divisors (1843784908).

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

1491535892 is a wasteful number, since it uses less digits than its factorization.

1491535892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4821 (or 4812 counting only the distinct ones).

The product of its digits is 388800, while the sum is 47.

The square root of 1491535892 is about 38620.4077140571. The cubic root of 1491535892 is about 1142.5570722287.

The spelling of 1491535892 in words is "one billion, four hundred ninety-one million, five hundred thirty-five thousand, eight hundred ninety-two".