1491890830 has 16 divisors (see below), whose sum is σ = 2826740880. Its totient is φ = 565348032.

The previous prime is 1491890797. The next prime is 1491890839. The reversal of 1491890830 is 380981941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491890839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3925839 + ... + 3926218.

It is an arithmetic number, because the mean of its divisors is an integer number (176671305).

Almost surely, 2^1491890830 is an apocalyptic number.

1491890830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1491890830 is a deficient number, since it is larger than the sum of its proper divisors (1334850050).

1491890830 is a wasteful number, since it uses less digits than its factorization.

1491890830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7852083.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 1491890830 is about 38625.0026537216. The cubic root of 1491890830 is about 1142.6476957621.

The spelling of 1491890830 in words is "one billion, four hundred ninety-one million, eight hundred ninety thousand, eight hundred thirty".