1222427700 has 540 divisors, whose sum is σ = 4612829760. Its totient is φ = 279002880.

The previous prime is 1222427699. The next prime is 1222427741. The reversal of 1222427700 is 77242221.

It is a tau number, because it is divible by the number of its divisors (540).

It is a Harshad number since it is a multiple of its sum of digits (27).

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 179 ways as a sum of consecutive naturals, for example, 26009077 + ... + 26009123.

Almost surely, 2^1222427700 is an apocalyptic number.

1222427700 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 1222427700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2306414880).

1222427700 is an abundant number, since it is smaller than the sum of its proper divisors (3390402060).

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

1222427700 is a wasteful number, since it uses less digits than its factorization.

1222427700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 1222427700 is about 34963.2335461124. The cubic root of 1222427700 is about 1069.2380227346.

Adding to 1222427700 its reverse (77242221), we get a palindrome (1299669921).

The spelling of 1222427700 in words is "one billion, two hundred twenty-two million, four hundred twenty-seven thousand, seven hundred".