1228750000 has 80 divisors (see below), whose sum is σ = 2978898624. Its totient is φ = 491000000.

The previous prime is 1228749979. The next prime is 1228750027. The reversal of 1228750000 is 578221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 1249509 + ... + 1250491.

Almost surely, 2^1228750000 is an apocalyptic number.

1228750000 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 1228750000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1489449312).

1228750000 is an abundant number, since it is smaller than the sum of its proper divisors (1750148624).

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

1228750000 is an frugal number, since it uses more digits than its factorization.

1228750000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026 (or 990 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1228750000 is about 35053.5304926622. The cubic root of 1228750000 is about 1071.0781923096.

The spelling of 1228750000 in words is "one billion, two hundred twenty-eight million, seven hundred fifty thousand".