1228428459 has 18 divisors (see below), whose sum is σ = 1854905780. Its totient is φ = 783342648.

The previous prime is 1228428427. The next prime is 1228428493. The reversal of 1228428459 is 9548248221.

It is not a de Polignac number, because 1228428459 - 2⁵ = 1228428427 is a prime.

It is a super-2 number, since 2×1228428459² = 3018072957762229362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228428419) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 124249 + ... + 133770.

Almost surely, 2^1228428459 is an apocalyptic number.

1228428459 is a deficient number, since it is larger than the sum of its proper divisors (626477321).

1228428459 is a wasteful number, since it uses less digits than its factorization.

1228428459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258071 (or 258045 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 1228428459 is about 35048.9437643989. The cubic root of 1228428459 is about 1070.9847570847.

The spelling of 1228428459 in words is "one billion, two hundred twenty-eight million, four hundred twenty-eight thousand, four hundred fifty-nine".