1228154180 has 96 divisors (see below), whose sum is σ = 2944553472. Its totient is φ = 426291200.

The previous prime is 1228154177. The next prime is 1228154183. The reversal of 1228154180 is 814518221.

It is an interprime number because it is at equal distance from previous prime (1228154177) and next prime (1228154183).

It is not an unprimeable number, because it can be changed into a prime (1228154183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 422492 + ... + 425388.

It is an arithmetic number, because the mean of its divisors is an integer number (30672432).

Almost surely, 2^1228154180 is an apocalyptic number.

1228154180 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 1228154180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1472276736).

1228154180 is an abundant number, since it is smaller than the sum of its proper divisors (1716399292).

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

1228154180 is a wasteful number, since it uses less digits than its factorization.

1228154180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3005 (or 3003 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 1228154180 is about 35045.0307461700. The cubic root of 1228154180 is about 1070.9050426357.

The spelling of 1228154180 in words is "one billion, two hundred twenty-eight million, one hundred fifty-four thousand, one hundred eighty".