1491870368 has 12 divisors (see below), whose sum is σ = 2937119850. Its totient is φ = 745935168.

The previous prime is 1491870361. The next prime is 1491870407. The reversal of 1491870368 is 8630781941.

It can be written as a sum of positive squares in only one way, i.e., 895924624 + 595945744 = 29932^2 + 24412^2 .

It is not an unprimeable number, because it can be changed into a prime (1491870361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23310443 + ... + 23310506.

Almost surely, 2^1491870368 is an apocalyptic number.

It is an amenable number.

1491870368 is a deficient number, since it is larger than the sum of its proper divisors (1445249482).

1491870368 is an equidigital number, since it uses as much as digits as its factorization.

1491870368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46620959 (or 46620951 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 1491870368 is about 38624.7377725726. The cubic root of 1491870368 is about 1142.6424717507.

The spelling of 1491870368 in words is "one billion, four hundred ninety-one million, eight hundred seventy thousand, three hundred sixty-eight".