1291368048 has 40 divisors (see below), whose sum is σ = 3390730896. Its totient is φ = 423398400.

The previous prime is 1291368047. The next prime is 1291368053. The reversal of 1291368048 is 8408631921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291368047) 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, 217593 + ... + 223448.

Almost surely, 2^1291368048 is an apocalyptic number.

It is an amenable number.

1291368048 is an abundant number, since it is smaller than the sum of its proper divisors (2099362848).

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

1291368048 is a wasteful number, since it uses less digits than its factorization.

1291368048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441113 (or 441107 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 1291368048 is about 35935.6097485489. The cubic root of 1291368048 is about 1088.9719139310.

Adding to 1291368048 its reverse (8408631921), we get a palindrome (9699999969).

The spelling of 1291368048 in words is "one billion, two hundred ninety-one million, three hundred sixty-eight thousand, forty-eight".