1216060600 has 96 divisors (see below), whose sum is σ = 2969809920. Its totient is φ = 462197120.

The previous prime is 1216060583. The next prime is 1216060603. The reversal of 1216060600 is 60606121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216060603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 767409 + ... + 768991.

It is an arithmetic number, because the mean of its divisors is an integer number (30935520).

Almost surely, 2^1216060600 is an apocalyptic number.

1216060600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216060600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1484904960).

1216060600 is an abundant number, since it is smaller than the sum of its proper divisors (1753749320).

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

1216060600 is a wasteful number, since it uses less digits than its factorization.

1216060600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789 (or 1780 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1216060600 is about 34872.0604495920. The cubic root of 1216060600 is about 1067.3783900210.

Adding to 1216060600 its reverse (60606121), we get a palindrome (1276666721).

It can be divided in two parts, 1 and 216060600, that added together give a square (216060601 = 14699²).

The spelling of 1216060600 in words is "one billion, two hundred sixteen million, sixty thousand, six hundred".