1128980776 has 48 divisors (see below), whose sum is σ = 2686314240. Its totient is φ = 439860960.

The previous prime is 1128980773. The next prime is 1128980777. The reversal of 1128980776 is 6770898211.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (1128980773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126600 + ... + 135223.

It is an arithmetic number, because the mean of its divisors is an integer number (55964880).

Almost surely, 2^1128980776 is an apocalyptic number.

It is an amenable number.

1128980776 is an abundant number, since it is smaller than the sum of its proper divisors (1557333464).

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

1128980776 is a wasteful number, since it uses less digits than its factorization.

1128980776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261854 (or 261843 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 49.

The square root of 1128980776 is about 33600.3091652443. The cubic root of 1128980776 is about 1041.2671856495.

The spelling of 1128980776 in words is "one billion, one hundred twenty-eight million, nine hundred eighty thousand, seven hundred seventy-six".