1228862773 has 4 divisors (see below), whose sum is σ = 1229894028. Its totient is φ = 1227831520.

The previous prime is 1228862743. The next prime is 1228862807. The reversal of 1228862773 is 3772688221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 849314449 + 379548324 = 29143^2 + 19482^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1228862773 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 (1228862743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513838 + ... + 516223.

It is an arithmetic number, because the mean of its divisors is an integer number (307473507).

Almost surely, 2^1228862773 is an apocalyptic number.

It is an amenable number.

1228862773 is a deficient number, since it is larger than the sum of its proper divisors (1031255).

1228862773 is a wasteful number, since it uses less digits than its factorization.

1228862773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031254.

The product of its digits is 451584, while the sum is 46.

The square root of 1228862773 is about 35055.1390383778. The cubic root of 1228862773 is about 1071.1109586727.

The spelling of 1228862773 in words is "one billion, two hundred twenty-eight million, eight hundred sixty-two thousand, seven hundred seventy-three".