1228332628 has 6 divisors (see below), whose sum is σ = 2149582106. Its totient is φ = 614166312.

The previous prime is 1228332617. The next prime is 1228332647. The reversal of 1228332628 is 8262338221.

It can be written as a sum of positive squares in only one way, i.e., 978313284 + 250019344 = 31278^2 + 15812^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153541575 + ... + 153541582.

Almost surely, 2^1228332628 is an apocalyptic number.

It is an amenable number.

1228332628 is a deficient number, since it is larger than the sum of its proper divisors (921249478).

1228332628 is a wasteful number, since it uses less digits than its factorization.

1228332628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307083161 (or 307083159 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 1228332628 is about 35047.5766351969. The cubic root of 1228332628 is about 1070.9569068102.

The spelling of 1228332628 in words is "one billion, two hundred twenty-eight million, three hundred thirty-two thousand, six hundred twenty-eight".