1228633649 has 8 divisors (see below), whose sum is σ = 1238758080. Its totient is φ = 1218527856.

The previous prime is 1228633631. The next prime is 1228633699. The reversal of 1228633649 is 9463368221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1228633649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228633699) 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, 147884 + ... + 155970.

It is an arithmetic number, because the mean of its divisors is an integer number (154844760).

Almost surely, 2^1228633649 is an apocalyptic number.

It is an amenable number.

1228633649 is a deficient number, since it is larger than the sum of its proper divisors (10124431).

1228633649 is a wasteful number, since it uses less digits than its factorization.

1228633649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9319.

The product of its digits is 373248, while the sum is 44.

The square root of 1228633649 is about 35051.8708345218. The cubic root of 1228633649 is about 1071.0443842520.

The spelling of 1228633649 in words is "one billion, two hundred twenty-eight million, six hundred thirty-three thousand, six hundred forty-nine".