1222689700 has 72 divisors (see below), whose sum is σ = 2759135904. Its totient is φ = 469920000.

The previous prime is 1222689667. The next prime is 1222689703. The reversal of 1222689700 is 79862221.

It is a self number, because there is not a number n which added to its sum of digits gives 1222689700.

It is not an unprimeable number, because it can be changed into a prime (1222689703) 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, 272475 + ... + 276925.

It is an arithmetic number, because the mean of its divisors is an integer number (38321332).

Almost surely, 2^1222689700 is an apocalyptic number.

1222689700 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 1222689700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1379567952).

1222689700 is an abundant number, since it is smaller than the sum of its proper divisors (1536446204).

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

1222689700 is a wasteful number, since it uses less digits than its factorization.

1222689700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573 (or 4566 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1222689700 is about 34966.9801384106. The cubic root of 1222689700 is about 1069.3144063523.

It can be divided in two parts, 12226 and 89700, that added together give a triangular number (101926 = T₄₅₁).

The spelling of 1222689700 in words is "one billion, two hundred twenty-two million, six hundred eighty-nine thousand, seven hundred".