1263758880 has 48 divisors (see below), whose sum is σ = 3980841984. Its totient is φ = 337002240.

The previous prime is 1263758879. The next prime is 1263758893. The reversal of 1263758880 is 888573621.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 1315936 + ... + 1316895.

It is an arithmetic number, because the mean of its divisors is an integer number (82934208).

Almost surely, 2^1263758880 is an apocalyptic number.

1263758880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263758880 is an abundant number, since it is smaller than the sum of its proper divisors (2717083104).

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

1263758880 is a wasteful number, since it uses less digits than its factorization.

1263758880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632849 (or 2632841 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 1263758880 is about 35549.3864925965. The cubic root of 1263758880 is about 1081.1552795281.

It can be divided in two parts, 12637 and 58880, that added together give a palindrome (71517).

The spelling of 1263758880 in words is "one billion, two hundred sixty-three million, seven hundred fifty-eight thousand, eight hundred eighty".