1286288620 has 48 divisors (see below), whose sum is σ = 2799064800. Its totient is φ = 495936000.

The previous prime is 1286288603. The next prime is 1286288669. The reversal of 1286288620 is 268826821.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427120 + ... + 430120.

It is an arithmetic number, because the mean of its divisors is an integer number (58313850).

Almost surely, 2^1286288620 is an apocalyptic number.

1286288620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1286288620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1399532400).

1286288620 is an abundant number, since it is smaller than the sum of its proper divisors (1512776180).

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

1286288620 is a wasteful number, since it uses less digits than its factorization.

1286288620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3778 (or 3776 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 1286288620 is about 35864.8660948288. The cubic root of 1286288620 is about 1087.5422614483.

The spelling of 1286288620 in words is "one billion, two hundred eighty-six million, two hundred eighty-eight thousand, six hundred twenty".