1491905272 has 32 divisors (see below), whose sum is σ = 3286367280. Its totient is φ = 625973760.

The previous prime is 1491905269. The next prime is 1491905273. The reversal of 1491905272 is 2725091941.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491905273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650913 + ... + 653200.

Almost surely, 2^1491905272 is an apocalyptic number.

It is an amenable number.

1491905272 is an abundant number, since it is smaller than the sum of its proper divisors (1794462008).

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

1491905272 is a wasteful number, since it uses less digits than its factorization.

1491905272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304143 (or 1304139 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 1491905272 is about 38625.1896047126. The cubic root of 1491905272 is about 1142.6513828203.

The spelling of 1491905272 in words is "one billion, four hundred ninety-one million, nine hundred five thousand, two hundred seventy-two".