1278409368 has 32 divisors (see below), whose sum is σ = 3334982400. Its totient is φ = 407608608.

The previous prime is 1278409339. The next prime is 1278409399. The reversal of 1278409368 is 8639048721.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 1157428 + ... + 1158531.

It is an arithmetic number, because the mean of its divisors is an integer number (104218200).

Almost surely, 2^1278409368 is an apocalyptic number.

It is an amenable number.

1278409368 is an abundant number, since it is smaller than the sum of its proper divisors (2056573032).

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

1278409368 is a wasteful number, since it uses less digits than its factorization.

1278409368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315991 (or 2315987 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 1278409368 is about 35754.8509715815. The cubic root of 1278409368 is about 1085.3171060920.

The spelling of 1278409368 in words is "one billion, two hundred seventy-eight million, four hundred nine thousand, three hundred sixty-eight".