1212503628 has 96 divisors (see below), whose sum is σ = 3316633600. Its totient is φ = 344615040.

The previous prime is 1212503609. The next prime is 1212503657. The reversal of 1212503628 is 8263052121.

It is a junction number, because it is equal to n+sod(n) for n = 1212503595 and 1212503604.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 917208 + ... + 918528.

Almost surely, 2^1212503628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212503628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1658316800).

1212503628 is an abundant number, since it is smaller than the sum of its proper divisors (2104129972).

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

1212503628 is a wasteful number, since it uses less digits than its factorization.

1212503628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572 (or 1556 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1212503628 is about 34821.0227879653. The cubic root of 1212503628 is about 1066.3366813026.

Adding to 1212503628 its reverse (8263052121), we get a palindrome (9475555749).

The spelling of 1212503628 in words is "one billion, two hundred twelve million, five hundred three thousand, six hundred twenty-eight".