1491768458 has 16 divisors (see below), whose sum is σ = 2252422080. Its totient is φ = 740969856.

The previous prime is 1491768457. The next prime is 1491768461. The reversal of 1491768458 is 8548671941.

It is not an unprimeable number, because it can be changed into a prime (1491768457) 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, 574010 + ... + 576602.

It is an arithmetic number, because the mean of its divisors is an integer number (140776380).

Almost surely, 2^1491768458 is an apocalyptic number.

1491768458 is a deficient number, since it is larger than the sum of its proper divisors (760653622).

1491768458 is a wasteful number, since it uses less digits than its factorization.

1491768458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381.

The product of its digits is 1935360, while the sum is 53.

The square root of 1491768458 is about 38623.4185177853. The cubic root of 1491768458 is about 1142.6164531036.

The spelling of 1491768458 in words is "one billion, four hundred ninety-one million, seven hundred sixty-eight thousand, four hundred fifty-eight".