1212154728 has 16 divisors (see below), whose sum is σ = 3030386880. Its totient is φ = 404051568.

The previous prime is 1212154711. The next prime is 1212154759. The reversal of 1212154728 is 8274512121.

It is a super-2 number, since 2×1212154728² = 2938638169225507968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25253200 + ... + 25253247.

It is an arithmetic number, because the mean of its divisors is an integer number (189399180).

Almost surely, 2^1212154728 is an apocalyptic number.

It is an amenable number.

1212154728 is an abundant number, since it is smaller than the sum of its proper divisors (1818232152).

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

1212154728 is a wasteful number, since it uses less digits than its factorization.

1212154728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50506456 (or 50506452 counting only the distinct ones).

The product of its digits is 8960, while the sum is 33.

The square root of 1212154728 is about 34816.0125229757. The cubic root of 1212154728 is about 1066.2343914205.

Adding to 1212154728 its reverse (8274512121), we get a palindrome (9486666849).

The spelling of 1212154728 in words is "one billion, two hundred twelve million, one hundred fifty-four thousand, seven hundred twenty-eight".