1286420608 has 64 divisors (see below), whose sum is σ = 2804893920. Its totient is φ = 582830080.

The previous prime is 1286420591. The next prime is 1286420621. The reversal of 1286420608 is 8060246821.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487260 + ... + 489892.

Almost surely, 2^1286420608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1286420608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1402446960).

1286420608 is an abundant number, since it is smaller than the sum of its proper divisors (1518473312).

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

1286420608 is a wasteful number, since it uses less digits than its factorization.

1286420608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005 (or 2993 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 1286420608 is about 35866.7061214157. The cubic root of 1286420608 is about 1087.5794582890.

It can be divided in two parts, 128 and 6420608, that added together give a triangular number (6420736 = T₃₅₈₃).

The spelling of 1286420608 in words is "one billion, two hundred eighty-six million, four hundred twenty thousand, six hundred eight".