1225268628 has 24 divisors (see below), whose sum is σ = 2912904288. Its totient is φ = 400716576.

The previous prime is 1225268623. The next prime is 1225268657. The reversal of 1225268628 is 8268625221.

It is a super-2 number, since 2×1225268628² = 3002566421522004768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1225268628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225268623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 962626 + ... + 963897.

It is an arithmetic number, because the mean of its divisors is an integer number (121371012).

Almost surely, 2^1225268628 is an apocalyptic number.

It is an amenable number.

1225268628 is an abundant number, since it is smaller than the sum of its proper divisors (1687635660).

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

1225268628 is a wasteful number, since it uses less digits than its factorization.

1225268628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926583 (or 1926581 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 1225268628 is about 35003.8373324983. The cubic root of 1225268628 is about 1070.0656867119.

The spelling of 1225268628 in words is "one billion, two hundred twenty-five million, two hundred sixty-eight thousand, six hundred twenty-eight".