1291883796 has 96 divisors (see below), whose sum is σ = 4029312000. Its totient is φ = 349678944.

The previous prime is 1291883773. The next prime is 1291883797. The reversal of 1291883796 is 6973881921.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291883797) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30606 + ... + 59333.

It is an arithmetic number, because the mean of its divisors is an integer number (41972000).

Almost surely, 2^1291883796 is an apocalyptic number.

It is an amenable number.

1291883796 is an abundant number, since it is smaller than the sum of its proper divisors (2737428204).

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

1291883796 is a wasteful number, since it uses less digits than its factorization.

1291883796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89978 (or 89970 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 1291883796 is about 35942.7850339953. The cubic root of 1291883796 is about 1089.1168662383.

The spelling of 1291883796 in words is "one billion, two hundred ninety-one million, eight hundred eighty-three thousand, seven hundred ninety-six".