1228961232 has 60 divisors (see below), whose sum is σ = 3457469184. Its totient is φ = 407499840.

The previous prime is 1228961207. The next prime is 1228961243. The reversal of 1228961232 is 2321698221.

It is a happy number.

1228961232 is a `hidden beast` number, since 1 + 2 + 2 + 8 + 9 + 612 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5163 + ... + 49845.

Almost surely, 2^1228961232 is an apocalyptic number.

1228961232 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 1228961232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1728734592).

1228961232 is an abundant number, since it is smaller than the sum of its proper divisors (2228507952).

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

1228961232 is a wasteful number, since it uses less digits than its factorization.

1228961232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44888 (or 44879 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 1228961232 is about 35056.5433549858. The cubic root of 1228961232 is about 1071.1395644427.

The spelling of 1228961232 in words is "one billion, two hundred twenty-eight million, nine hundred sixty-one thousand, two hundred thirty-two".