1260395840 has 112 divisors (see below), whose sum is σ = 3291620544. Its totient is φ = 455884800.

The previous prime is 1260395803. The next prime is 1260395947. The reversal of 1260395840 is 485930621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1260395794 and 1260395803.

It is a congruent number.

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, 741872 + ... + 743568.

Almost surely, 2^1260395840 is an apocalyptic number.

1260395840 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 1260395840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1645810272).

1260395840 is an abundant number, since it is smaller than the sum of its proper divisors (2031224704).

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

1260395840 is a wasteful number, since it uses less digits than its factorization.

1260395840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936 (or 1926 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1260395840 is about 35502.0540250842. The cubic root of 1260395840 is about 1080.1953921741.

The spelling of 1260395840 in words is "one billion, two hundred sixty million, three hundred ninety-five thousand, eight hundred forty".