1213632700 has 72 divisors (see below), whose sum is σ = 3015001472. Its totient is φ = 415385280.

The previous prime is 1213632683. The next prime is 1213632713. The reversal of 1213632700 is 72363121.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 549799 + ... + 552001.

Almost surely, 2^1213632700 is an apocalyptic number.

1213632700 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 1213632700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1507500736).

1213632700 is an abundant number, since it is smaller than the sum of its proper divisors (1801368772).

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

1213632700 is a wasteful number, since it uses less digits than its factorization.

1213632700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011 (or 3004 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 1213632700 is about 34837.2315203146. The cubic root of 1213632700 is about 1066.6675661885.

Adding to 1213632700 its reverse (72363121), we get a palindrome (1285995821).

The spelling of 1213632700 in words is "one billion, two hundred thirteen million, six hundred thirty-two thousand, seven hundred".