1228825626 has 64 divisors (see below), whose sum is σ = 2875392000. Its totient is φ = 349951728.

The previous prime is 1228825621. The next prime is 1228825639. The reversal of 1228825626 is 6265288221.

It is a super-2 number, since 2×1228825626² = 3020024838228583752, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1228825621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 787435 + ... + 788993.

It is an arithmetic number, because the mean of its divisors is an integer number (44928000).

Almost surely, 2^1228825626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228825626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437696000).

1228825626 is an abundant number, since it is smaller than the sum of its proper divisors (1646566374).

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

1228825626 is a wasteful number, since it uses less digits than its factorization.

1228825626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968 (or 1954 counting only the distinct ones).

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

The square root of 1228825626 is about 35054.6091976505. The cubic root of 1228825626 is about 1071.1001657780.

The spelling of 1228825626 in words is "one billion, two hundred twenty-eight million, eight hundred twenty-five thousand, six hundred twenty-six".