1491670320 has 160 divisors (see below), whose sum is σ = 5357609472. Its totient is φ = 336254976.

The previous prime is 1491670291. The next prime is 1491670339. The reversal of 1491670320 is 230761941.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116559 + ... + 128721.

Almost surely, 2^1491670320 is an apocalyptic number.

1491670320 is a gapful number since it is divisible by the number (10) 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 1491670320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2678804736).

1491670320 is an abundant number, since it is smaller than the sum of its proper divisors (3865939152).

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

1491670320 is a wasteful number, since it uses less digits than its factorization.

1491670320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12259 (or 12253 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 1491670320 is about 38622.1480500502. The cubic root of 1491670320 is about 1142.5913963660.

The spelling of 1491670320 in words is "one billion, four hundred ninety-one million, six hundred seventy thousand, three hundred twenty".