1268336420 has 24 divisors (see below), whose sum is σ = 2868392184. Its totient is φ = 468308736.

The previous prime is 1268336417. The next prime is 1268336437. The reversal of 1268336420 is 246338621.

It can be written as a sum of positive squares in 4 ways, for example, as 59105344 + 1209231076 = 7688^2 + 34774^2 .

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, 2438849 + ... + 2439368.

It is an arithmetic number, because the mean of its divisors is an integer number (119516341).

Almost surely, 2^1268336420 is an apocalyptic number.

1268336420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1268336420 is an abundant number, since it is smaller than the sum of its proper divisors (1600055764).

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

1268336420 is a wasteful number, since it uses less digits than its factorization.

1268336420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4878239 (or 4878237 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 1268336420 is about 35613.7111236670. The cubic root of 1268336420 is about 1082.4590799637.

It can be divided in two parts, 1268336 and 420, that multiplied together give a triangular number (532701120 = T₃₂₆₄₀).

The spelling of 1268336420 in words is "one billion, two hundred sixty-eight million, three hundred thirty-six thousand, four hundred twenty".