1286769672 has 64 divisors (see below), whose sum is σ = 3697632000. Its totient is φ = 414130752.

The previous prime is 1286769647. The next prime is 1286769677. The reversal of 1286769672 is 2769676821.

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

It is not an unprimeable number, because it can be changed into a prime (1286769677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96448 + ... + 108975.

It is an arithmetic number, because the mean of its divisors is an integer number (57775500).

Almost surely, 2^1286769672 is an apocalyptic number.

1286769672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1286769672 is an abundant number, since it is smaller than the sum of its proper divisors (2410862328).

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

1286769672 is a wasteful number, since it uses less digits than its factorization.

1286769672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205467 (or 205457 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 1286769672 is about 35871.5719198365. The cubic root of 1286769672 is about 1087.6778191987.

The spelling of 1286769672 in words is "one billion, two hundred eighty-six million, seven hundred sixty-nine thousand, six hundred seventy-two".