1227225528 has 48 divisors (see below), whose sum is σ = 3326843520. Its totient is φ = 408692736.

The previous prime is 1227225481. The next prime is 1227225553. The reversal of 1227225528 is 8255227221.

1227225528 is a `hidden beast` number, since 122 + 7 + 2 + 2 + 5 + 528 = 666.

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 = 1227225492 and 1227225501.

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, 75625 + ... + 90407.

It is an arithmetic number, because the mean of its divisors is an integer number (69309240).

Almost surely, 2^1227225528 is an apocalyptic number.

1227225528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1227225528 is an abundant number, since it is smaller than the sum of its proper divisors (2099617992).

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

1227225528 is a wasteful number, since it uses less digits than its factorization.

1227225528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15948 (or 15941 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 1227225528 is about 35031.7788300851. The cubic root of 1227225528 is about 1070.6350578379.

The spelling of 1227225528 in words is "one billion, two hundred twenty-seven million, two hundred twenty-five thousand, five hundred twenty-eight".