1278922608 has 200 divisors, whose sum is σ = 3865990656. Its totient is φ = 409406400.

The previous prime is 1278922583. The next prime is 1278922609. The reversal of 1278922608 is 8062298721.

1278922608 is a `hidden beast` number, since 12 + 7 + 8 + 9 + 22 + 608 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278922609) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9762703 + ... + 9762833.

Almost surely, 2^1278922608 is an apocalyptic number.

1278922608 is a gapful number since it is divisible by the number (18) 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 1278922608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1932995328).

1278922608 is an abundant number, since it is smaller than the sum of its proper divisors (2587068048).

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

1278922608 is an frugal number, since it uses more digits than its factorization.

1278922608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 1278922608 is about 35762.0274593038. The cubic root of 1278922608 is about 1085.4623265613.

The spelling of 1278922608 in words is "one billion, two hundred seventy-eight million, nine hundred twenty-two thousand, six hundred eight".