1225980000 has 540 divisors, whose sum is σ = 5104319220. Its totient is φ = 278208000.

The previous prime is 1225979981. The next prime is 1225980001. The reversal of 1225980000 is 895221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225980001) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 8819931 + ... + 8820069.

It is an arithmetic number, because the mean of its divisors is an integer number (9452443).

Almost surely, 2^1225980000 is an apocalyptic number.

1225980000 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 1225980000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2552159610).

1225980000 is an abundant number, since it is smaller than the sum of its proper divisors (3878339220).

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

1225980000 is a wasteful number, since it uses less digits than its factorization.

1225980000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1225980000 is about 35013.9972011194. The cubic root of 1225980000 is about 1070.2727345057.

The spelling of 1225980000 in words is "one billion, two hundred twenty-five million, nine hundred eighty thousand".