1286491488 has 48 divisors (see below), whose sum is σ = 3383352000. Its totient is φ = 428029056.

The previous prime is 1286491457. The next prime is 1286491489. The reversal of 1286491488 is 8841946821.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1286491488.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286491489) 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, 40263 + ... + 64761.

It is an arithmetic number, because the mean of its divisors is an integer number (70486500).

Almost surely, 2^1286491488 is an apocalyptic number.

It is an amenable number.

1286491488 is an abundant number, since it is smaller than the sum of its proper divisors (2096860512).

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

1286491488 is a wasteful number, since it uses less digits than its factorization.

1286491488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25059 (or 25051 counting only the distinct ones).

The product of its digits is 884736, while the sum is 51.

The square root of 1286491488 is about 35867.6942108076. The cubic root of 1286491488 is about 1087.5994326312.

The spelling of 1286491488 in words is "one billion, two hundred eighty-six million, four hundred ninety-one thousand, four hundred eighty-eight".