1278236160 has 160 divisors (see below), whose sum is σ = 4540646880. Its totient is φ = 340844544.

The previous prime is 1278236149. The next prime is 1278236209. The reversal of 1278236160 is 616328721.

1278236160 is a `hidden beast` number, since 12 + 7 + 8 + 23 + 616 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59874 + ... + 78366.

It is an arithmetic number, because the mean of its divisors is an integer number (28379043).

Almost surely, 2^1278236160 is an apocalyptic number.

1278236160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278236160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2270323440).

1278236160 is an abundant number, since it is smaller than the sum of its proper divisors (3262410720).

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

1278236160 is an equidigital number, since it uses as much as digits as its factorization.

1278236160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18525 (or 18503 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1278236160 is about 35752.4287286892. The cubic root of 1278236160 is about 1085.2680883828.

The spelling of 1278236160 in words is "one billion, two hundred seventy-eight million, two hundred thirty-six thousand, one hundred sixty".