1228533000 has 128 divisors (see below), whose sum is σ = 3915025920. Its totient is φ = 320601600.

The previous prime is 1228532983. The next prime is 1228533001. The reversal of 1228533000 is 3358221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1228533001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136644 + ... + 145356.

It is an arithmetic number, because the mean of its divisors is an integer number (30586140).

Almost surely, 2^1228533000 is an apocalyptic number.

1228533000 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 1228533000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1957512960).

1228533000 is an abundant number, since it is smaller than the sum of its proper divisors (2686492920).

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

1228533000 is a wasteful number, since it uses less digits than its factorization.

1228533000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8784 (or 8770 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1228533000 is about 35050.4350900242. The cubic root of 1228533000 is about 1071.0151369956.

The spelling of 1228533000 in words is "one billion, two hundred twenty-eight million, five hundred thirty-three thousand".