1228629005 has 8 divisors (see below), whose sum is σ = 1475589624. Its totient is φ = 982080000.

The previous prime is 1228628969. The next prime is 1228629007. The reversal of 1228629005 is 5009268221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5098564 + 1223530441 = 2258^2 + 34979^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1228629005 - 2⁶ = 1228628941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228629007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96296 + ... + 108305.

It is an arithmetic number, because the mean of its divisors is an integer number (184448703).

Almost surely, 2^1228629005 is an apocalyptic number.

It is an amenable number.

1228629005 is a deficient number, since it is larger than the sum of its proper divisors (246960619).

1228629005 is a wasteful number, since it uses less digits than its factorization.

1228629005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205807.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 1228629005 is about 35051.8045897783. The cubic root of 1228629005 is about 1071.0430348027.

The spelling of 1228629005 in words is "one billion, two hundred twenty-eight million, six hundred twenty-nine thousand, five".