1491757248 has 28 divisors (see below), whose sum is σ = 3946941560. Its totient is φ = 497252352.

The previous prime is 1491757219. The next prime is 1491757249. The reversal of 1491757248 is 8427571941.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1491757197 and 1491757206.

It is not an unprimeable number, because it can be changed into a prime (1491757249) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3884593 + ... + 3884976.

Almost surely, 2^1491757248 is an apocalyptic number.

It is an amenable number.

1491757248 is an abundant number, since it is smaller than the sum of its proper divisors (2455184312).

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

1491757248 is an equidigital number, since it uses as much as digits as its factorization.

1491757248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7769584 (or 7769574 counting only the distinct ones).

The product of its digits is 564480, while the sum is 48.

The square root of 1491757248 is about 38623.2733983022. The cubic root of 1491757248 is about 1142.6135910056.

The spelling of 1491757248 in words is "one billion, four hundred ninety-one million, seven hundred fifty-seven thousand, two hundred forty-eight".