1216170004 has 36 divisors (see below), whose sum is σ = 2621415636. Its totient is φ = 490554624.

The previous prime is 1216169963. The next prime is 1216170017. The reversal of 1216170004 is 4000716121.

It can be written as a sum of positive squares in 2 ways, for example, as 764522500 + 451647504 = 27650^2 + 21252^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179167 + ... + 185830.

It is an arithmetic number, because the mean of its divisors is an integer number (72817101).

Almost surely, 2^1216170004 is an apocalyptic number.

1216170004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1216170004 is an abundant number, since it is smaller than the sum of its proper divisors (1405245632).

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

1216170004 is a wasteful number, since it uses less digits than its factorization.

1216170004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365032 (or 365023 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1216170004 is about 34873.6290626599. The cubic root of 1216170004 is about 1067.4103982843.

Adding to 1216170004 its reverse (4000716121), we get a palindrome (5216886125).

The spelling of 1216170004 in words is "one billion, two hundred sixteen million, one hundred seventy thousand, four".