1213669028 has 48 divisors (see below), whose sum is σ = 2498670720. Its totient is φ = 508531200.

The previous prime is 1213669027. The next prime is 1213669033. The reversal of 1213669028 is 8209663121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1213668982 and 1213669000.

It is not an unprimeable number, because it can be changed into a prime (1213669027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 777713 + ... + 779271.

It is an arithmetic number, because the mean of its divisors is an integer number (52055640).

Almost surely, 2^1213669028 is an apocalyptic number.

It is an amenable number.

1213669028 is an abundant number, since it is smaller than the sum of its proper divisors (1285001692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213669028 is a wasteful number, since it uses less digits than its factorization.

1213669028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2948 (or 2946 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1213669028 is about 34837.7529126090. The cubic root of 1213669028 is about 1066.6782090331.

The spelling of 1213669028 in words is "one billion, two hundred thirteen million, six hundred sixty-nine thousand, twenty-eight".