1255760400 has 120 divisors (see below), whose sum is σ = 4152504064. Its totient is φ = 324057600.

The previous prime is 1255760393. The next prime is 1255760413. The reversal of 1255760400 is 40675521.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20322 + ... + 54078.

Almost surely, 2^1255760400 is an apocalyptic number.

1255760400 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 1255760400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2076252032).

1255760400 is an abundant number, since it is smaller than the sum of its proper divisors (2896743664).

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

1255760400 is a wasteful number, since it uses less digits than its factorization.

1255760400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33809 (or 33798 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 1255760400 is about 35436.7097795492. The cubic root of 1255760400 is about 1078.8695304211.

The spelling of 1255760400 in words is "one billion, two hundred fifty-five million, seven hundred sixty thousand, four hundred".