1491967876 has 81 divisors (see below), whose sum is σ = 3174014277. Its totient is φ = 611835840.

The previous prime is 1491967871. The next prime is 1491967891. The reversal of 1491967876 is 6787691941.

The square root of 1491967876 is 38626.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 286489476 + 1205478400 = 16926^2 + 34720^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1491967876.

It is not an unprimeable number, because it can be changed into a prime (1491967871) 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 26 ways as a sum of consecutive naturals, for example, 16763640 + ... + 16763728.

Almost surely, 2^1491967876 is an apocalyptic number.

1491967876 is the 38626-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1491967876

1491967876 is an abundant number, since it is smaller than the sum of its proper divisors (1682046401).

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

1491967876 is an equidigital number, since it uses as much as digits as its factorization.

1491967876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 129 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 58.

The cubic root of 1491967876 is about 1142.6673654138.

The spelling of 1491967876 in words is "one billion, four hundred ninety-one million, nine hundred sixty-seven thousand, eight hundred seventy-six".