1278619788 has 24 divisors (see below), whose sum is σ = 2992308592. Its totient is φ = 424940544.

The previous prime is 1278619787. The next prime is 1278619829. The reversal of 1278619788 is 8879168721.

It is not an unprimeable number, because it can be changed into a prime (1278619787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154045 + ... + 162132.

Almost surely, 2^1278619788 is an apocalyptic number.

It is an amenable number.

1278619788 is an abundant number, since it is smaller than the sum of its proper divisors (1713688804).

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

1278619788 is a wasteful number, since it uses less digits than its factorization.

1278619788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316521 (or 316519 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 57.

The square root of 1278619788 is about 35757.7933882951. The cubic root of 1278619788 is about 1085.3766488078.

The spelling of 1278619788 in words is "one billion, two hundred seventy-eight million, six hundred nineteen thousand, seven hundred eighty-eight".