1216474884 has 27 divisors (see below), whose sum is σ = 3075507253. Its totient is φ = 405421872.

The previous prime is 1216474849. The next prime is 1216474891. The reversal of 1216474884 is 4884746121.

The square root of 1216474884 is 34878.

It is a perfect power (a square), and thus also a powerful number.

1216474884 is a `hidden beast` number, since 1 + 2 + 164 + 7 + 488 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 845064900 + 371409984 = 29070^2 + 19272^2 .

It is a super-2 number, since 2×1216474884² = 2959622286805626912, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 206362 + ... + 212174.

Almost surely, 2^1216474884 is an apocalyptic number.

1216474884 is the 34878-th square number.

It is an amenable number.

1216474884 is an abundant number, since it is smaller than the sum of its proper divisors (1859032369).

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

1216474884 is an frugal number, since it uses more digits than its factorization.

1216474884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11636 (or 5818 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The cubic root of 1216474884 is about 1067.4995867176.

It can be divided in two parts, 1216 and 474884, that added together give a square (476100 = 690²).

The spelling of 1216474884 in words is "one billion, two hundred sixteen million, four hundred seventy-four thousand, eight hundred eighty-four".