1278253988 has 12 divisors (see below), whose sum is σ = 2440303152. Its totient is φ = 581024520.

The previous prime is 1278253981. The next prime is 1278254023. The reversal of 1278253988 is 8893528721.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1278253981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14525570 + ... + 14525657.

It is an arithmetic number, because the mean of its divisors is an integer number (203358596).

Almost surely, 2^1278253988 is an apocalyptic number.

It is an amenable number.

1278253988 is a deficient number, since it is larger than the sum of its proper divisors (1162049164).

1278253988 is a wasteful number, since it uses less digits than its factorization.

1278253988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29051242 (or 29051240 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 53.

The square root of 1278253988 is about 35752.6780535389. The cubic root of 1278253988 is about 1085.2731338953.

The spelling of 1278253988 in words is "one billion, two hundred seventy-eight million, two hundred fifty-three thousand, nine hundred eighty-eight".