1212726528 has 216 divisors, whose sum is σ = 3965605280. Its totient is φ = 353341440.

The previous prime is 1212726523. The next prime is 1212726583. The reversal of 1212726528 is 8256272121.

It is a happy number.

1212726528 is a `hidden beast` number, since 1 + 2 + 127 + 2 + 6 + 528 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1212726492 and 1212726501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212726523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 568023 + ... + 570153.

Almost surely, 2^1212726528 is an apocalyptic number.

1212726528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212726528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1982802640).

1212726528 is an abundant number, since it is smaller than the sum of its proper divisors (2752878752).

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

1212726528 is a wasteful number, since it uses less digits than its factorization.

1212726528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185 (or 2168 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 1212726528 is about 34824.2232935639. The cubic root of 1212726528 is about 1066.4020204563.

Adding to 1212726528 its reverse (8256272121), we get a palindrome (9468998649).

The spelling of 1212726528 in words is "one billion, two hundred twelve million, seven hundred twenty-six thousand, five hundred twenty-eight".