1216417738 has 8 divisors (see below), whose sum is σ = 1824801732. Its totient is φ = 608150496.

The previous prime is 1216417723. The next prime is 1216417757. The reversal of 1216417738 is 8377146121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1171487529 + 44930209 = 34227^2 + 6703^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1216417738² = 2959344226642073288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1216417738.

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, 4756 + ... + 49552.

Almost surely, 2^1216417738 is an apocalyptic number.

1216417738 is a deficient number, since it is larger than the sum of its proper divisors (608383994).

1216417738 is a wasteful number, since it uses less digits than its factorization.

1216417738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58376.

The product of its digits is 56448, while the sum is 40.

The square root of 1216417738 is about 34877.1807633587. The cubic root of 1216417738 is about 1067.4828705795.

The spelling of 1216417738 in words is "one billion, two hundred sixteen million, four hundred seventeen thousand, seven hundred thirty-eight".