1268270028 has 48 divisors (see below), whose sum is σ = 3293643360. Its totient is φ = 422044992.

The previous prime is 1268270011. The next prime is 1268270033. The reversal of 1268270028 is 8200728621.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1268269974 and 1268270001.

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, 56626 + ... + 75782.

It is an arithmetic number, because the mean of its divisors is an integer number (68617570).

Almost surely, 2^1268270028 is an apocalyptic number.

1268270028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1268270028 is an abundant number, since it is smaller than the sum of its proper divisors (2025373332).

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

1268270028 is a wasteful number, since it uses less digits than its factorization.

1268270028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19783 (or 19775 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1268270028 is about 35612.7789985561. The cubic root of 1268270028 is about 1082.4401922627.

Adding to 1268270028 its reverse (8200728621), we get a palindrome (9468998649).

The spelling of 1268270028 in words is "one billion, two hundred sixty-eight million, two hundred seventy thousand, twenty-eight".