1268851740 has 96 divisors (see below), whose sum is σ = 3915158016. Its totient is φ = 305061120.

The previous prime is 1268851739. The next prime is 1268851781. The reversal of 1268851740 is 471588621.

It is a junction number, because it is equal to n+sod(n) for n = 1268851692 and 1268851701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14625 + ... + 52455.

It is an arithmetic number, because the mean of its divisors is an integer number (40782896).

Almost surely, 2^1268851740 is an apocalyptic number.

1268851740 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 1268851740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1957579008).

1268851740 is an abundant number, since it is smaller than the sum of its proper divisors (2646306276).

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

1268851740 is a wasteful number, since it uses less digits than its factorization.

1268851740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37899 (or 37897 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 1268851740 is about 35620.9452429326. The cubic root of 1268851740 is about 1082.6056597081.

The spelling of 1268851740 in words is "one billion, two hundred sixty-eight million, eight hundred fifty-one thousand, seven hundred forty".