1268645430 has 64 divisors (see below), whose sum is σ = 3284709120. Its totient is φ = 311734656.

The previous prime is 1268645429. The next prime is 1268645453. The reversal of 1268645430 is 345468621.

It is a super-2 number, since 2×1268645430² = 3218922454119769800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 248241 + ... + 253299.

It is an arithmetic number, because the mean of its divisors is an integer number (51323580).

Almost surely, 2^1268645430 is an apocalyptic number.

1268645430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1268645430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1642354560).

1268645430 is an abundant number, since it is smaller than the sum of its proper divisors (2016063690).

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

1268645430 is a wasteful number, since it uses less digits than its factorization.

1268645430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5725.

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 1268645430 is about 35618.0492166542. The cubic root of 1268645430 is about 1082.5469808062.

The spelling of 1268645430 in words is "one billion, two hundred sixty-eight million, six hundred forty-five thousand, four hundred thirty".