1260757440 has 224 divisors, whose sum is σ = 4471172160. Its totient is φ = 334430208.

The previous prime is 1260757423. The next prime is 1260757441. The reversal of 1260757440 is 447570621.

1260757440 is a `hidden beast` number, since 1 + 2 + 607 + 5 + 7 + 4 + 40 = 666.

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 = 1260757395 and 1260757404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260757441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2911464 + ... + 2911896.

It is an arithmetic number, because the mean of its divisors is an integer number (19960590).

Almost surely, 2^1260757440 is an apocalyptic number.

1260757440 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 1260757440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2235586080).

1260757440 is an abundant number, since it is smaller than the sum of its proper divisors (3210414720).

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

1260757440 is a wasteful number, since it uses less digits than its factorization.

1260757440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 1260757440 is about 35507.1463229587. The cubic root of 1260757440 is about 1080.2986828213.

The spelling of 1260757440 in words is "one billion, two hundred sixty million, seven hundred fifty-seven thousand, four hundred forty".