1228561072 has 10 divisors (see below), whose sum is σ = 2380337108. Its totient is φ = 614280528.

The previous prime is 1228561069. The next prime is 1228561129. The reversal of 1228561072 is 2701658221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38392518 + ... + 38392549.

Almost surely, 2^1228561072 is an apocalyptic number.

It is an amenable number.

1228561072 is a deficient number, since it is larger than the sum of its proper divisors (1151776036).

1228561072 is an equidigital number, since it uses as much as digits as its factorization.

1228561072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76785075 (or 76785069 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 1228561072 is about 35050.8355392564. The cubic root of 1228561072 is about 1071.0232945049.

The spelling of 1228561072 in words is "one billion, two hundred twenty-eight million, five hundred sixty-one thousand, seventy-two".