1255784880 has 160 divisors (see below), whose sum is σ = 4459428864. Its totient is φ = 286368768.

The previous prime is 1255784861. The next prime is 1255784891. The reversal of 1255784880 is 884875521.

It is a super-2 number, since 2×1255784880² = 3153991329673228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 1298157 + ... + 1299123.

Almost surely, 2^1255784880 is an apocalyptic number.

1255784880 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 1255784880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2229714432).

1255784880 is an abundant number, since it is smaller than the sum of its proper divisors (3203643984).

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

1255784880 is a wasteful number, since it uses less digits than its factorization.

1255784880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763 (or 1757 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 48.

The square root of 1255784880 is about 35437.0551823935. The cubic root of 1255784880 is about 1078.8765409290.

The spelling of 1255784880 in words is "one billion, two hundred fifty-five million, seven hundred eighty-four thousand, eight hundred eighty".