1278030000 has 400 divisors, whose sum is σ = 4636890720. Its totient is φ = 301056000.

The previous prime is 1278029957. The next prime is 1278030007. The reversal of 1278030000 is 308721.

It is a tau number, because it is divible by the number of its divisors (400).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278030007) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11309944 + ... + 11310056.

Almost surely, 2^1278030000 is an apocalyptic number.

1278030000 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 1278030000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2318445360).

1278030000 is an abundant number, since it is smaller than the sum of its proper divisors (3358860720).

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

1278030000 is a wasteful number, since it uses less digits than its factorization.

1278030000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1278030000 is about 35749.5454516557. The cubic root of 1278030000 is about 1085.2097395149.

Adding to 1278030000 its reverse (308721), we get a palindrome (1278338721).

It can be divided in two parts, 12 and 78030000, that multiplied together give a square (936360000 = 30600²).

The spelling of 1278030000 in words is "one billion, two hundred seventy-eight million, thirty thousand".