1227273228 has 36 divisors (see below), whose sum is σ = 3182763640. Its totient is φ = 408969720.

The previous prime is 1227273199. The next prime is 1227273233. The reversal of 1227273228 is 8223727221.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 1227273192 and 1227273201.

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, 362383 + ... + 365753.

Almost surely, 2^1227273228 is an apocalyptic number.

1227273228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1227273228 is an abundant number, since it is smaller than the sum of its proper divisors (1955490412).

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

1227273228 is an frugal number, since it uses more digits than its factorization.

1227273228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6755 (or 3376 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 1227273228 is about 35032.4596338881. The cubic root of 1227273228 is about 1070.6489288636.

Multiplying 1227273228 by its product of digits (37632), we get a square (46184746116096 = 6795936²).

The spelling of 1227273228 in words is "one billion, two hundred twenty-seven million, two hundred seventy-three thousand, two hundred twenty-eight".