1228545792 has 252 divisors, whose sum is σ = 3820297320. Its totient is φ = 393652224.

The previous prime is 1228545767. The next prime is 1228545797. The reversal of 1228545792 is 2975458221.

1228545792 is a `hidden beast` number, since 1 + 2 + 28 + 54 + 579 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228545797) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5411983 + ... + 5412209.

It is an arithmetic number, because the mean of its divisors is an integer number (15159910).

Almost surely, 2^1228545792 is an apocalyptic number.

1228545792 is a gapful number since it is divisible by the number (12) 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 1228545792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1910148660).

1228545792 is an abundant number, since it is smaller than the sum of its proper divisors (2591751528).

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

1228545792 is an frugal number, since it uses more digits than its factorization.

1228545792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 261 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 1228545792 is about 35050.6175694523. The cubic root of 1228545792 is about 1071.0188542687.

The spelling of 1228545792 in words is "one billion, two hundred twenty-eight million, five hundred forty-five thousand, seven hundred ninety-two".