1228962639 has 8 divisors (see below), whose sum is σ = 1639123840. Its totient is φ = 819054936.

The previous prime is 1228962619. The next prime is 1228962653. The reversal of 1228962639 is 9362698221.

It is a happy number.

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

It is not a de Polignac number, because 1228962639 - 2⁵ = 1228962607 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 (1228962619) 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, 51757 + ... + 71670.

It is an arithmetic number, because the mean of its divisors is an integer number (204890480).

Almost surely, 2^1228962639 is an apocalyptic number.

1228962639 is a deficient number, since it is larger than the sum of its proper divisors (410161201).

1228962639 is a wasteful number, since it uses less digits than its factorization.

1228962639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126749.

The product of its digits is 559872, while the sum is 48.

The square root of 1228962639 is about 35056.5634225604. The cubic root of 1228962639 is about 1071.1399732141.

The spelling of 1228962639 in words is "one billion, two hundred twenty-eight million, nine hundred sixty-two thousand, six hundred thirty-nine".