1491896144 has 10 divisors (see below), whose sum is σ = 2890548810. Its totient is φ = 745948064.

The previous prime is 1491896141. The next prime is 1491896179. The reversal of 1491896144 is 4416981941.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 905287744 + 586608400 = 30088^2 + 24220^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491896141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46621739 + ... + 46621770.

It is an arithmetic number, because the mean of its divisors is an integer number (289054881).

Almost surely, 2^1491896144 is an apocalyptic number.

It is an amenable number.

1491896144 is a deficient number, since it is larger than the sum of its proper divisors (1398652666).

1491896144 is an equidigital number, since it uses as much as digits as its factorization.

1491896144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93243517 (or 93243511 counting only the distinct ones).

The product of its digits is 248832, while the sum is 47.

The square root of 1491896144 is about 38625.0714432996. The cubic root of 1491896144 is about 1142.6490524348.

The spelling of 1491896144 in words is "one billion, four hundred ninety-one million, eight hundred ninety-six thousand, one hundred forty-four".