228721450 has 12 divisors (see below), whose sum is σ = 425421990. Its totient is φ = 91488560.

The previous prime is 228721439. The next prime is 228721477. The reversal of 228721450 is 54127822.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 205033761 + 23687689 = 14319^2 + 4867^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 2287165 + ... + 2287264.

Almost surely, 2^228721450 is an apocalyptic number.

228721450 is a deficient number, since it is larger than the sum of its proper divisors (196700540).

228721450 is a wasteful number, since it uses less digits than its factorization.

228721450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4574441 (or 4574436 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 228721450 is about 15123.5395989167. The cubic root of 228721450 is about 611.5551557526. Note that the first 3 decimals are identical.

The spelling of 228721450 in words is "two hundred twenty-eight million, seven hundred twenty-one thousand, four hundred fifty".