1213274828 has 12 divisors (see below), whose sum is σ = 2125547760. Its totient is φ = 605975472.

The previous prime is 1213274737. The next prime is 1213274833. The reversal of 1213274828 is 8284723121.

It is a junction number, because it is equal to n+sod(n) for n = 1213274791 and 1213274800.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161351 + ... + 168702.

It is an arithmetic number, because the mean of its divisors is an integer number (177128980).

Almost surely, 2^1213274828 is an apocalyptic number.

It is an amenable number.

1213274828 is a deficient number, since it is larger than the sum of its proper divisors (912272932).

1213274828 is a wasteful number, since it uses less digits than its factorization.

1213274828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330976 (or 330974 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 1213274828 is about 34832.0947977580. The cubic root of 1213274828 is about 1066.5627107457.

Adding to 1213274828 its reverse (8284723121), we get a palindrome (9497997949).

The spelling of 1213274828 in words is "one billion, two hundred thirteen million, two hundred seventy-four thousand, eight hundred twenty-eight".