1278722088 has 48 divisors (see below), whose sum is σ = 3957950880. Its totient is φ = 365349024.

The previous prime is 1278722017. The next prime is 1278722111. The reversal of 1278722088 is 8802278721.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1268070 + ... + 1269077.

It is an arithmetic number, because the mean of its divisors is an integer number (82457310).

Almost surely, 2^1278722088 is an apocalyptic number.

1278722088 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1278722088 is an abundant number, since it is smaller than the sum of its proper divisors (2679228792).

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

1278722088 is a wasteful number, since it uses less digits than its factorization.

1278722088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537166 (or 2537159 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The square root of 1278722088 is about 35759.2238170797. The cubic root of 1278722088 is about 1085.4055943607.

The spelling of 1278722088 in words is "one billion, two hundred seventy-eight million, seven hundred twenty-two thousand, eighty-eight".