1229217400 has 24 divisors (see below), whose sum is σ = 2857930920. Its totient is φ = 491686880.

The previous prime is 1229217371. The next prime is 1229217401. The reversal of 1229217400 is 47129221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229217401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3072844 + ... + 3073243.

It is an arithmetic number, because the mean of its divisors is an integer number (119080455).

Almost surely, 2^1229217400 is an apocalyptic number.

1229217400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1229217400 is an abundant number, since it is smaller than the sum of its proper divisors (1628713520).

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

1229217400 is a wasteful number, since it uses less digits than its factorization.

1229217400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6146103 (or 6146094 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1229217400 is about 35060.1968049240. The cubic root of 1229217400 is about 1071.2139830140.

It can be divided in two parts, 122921 and 7400, that added together give a 4-th power (130321 = 19⁴).

The spelling of 1229217400 in words is "one billion, two hundred twenty-nine million, two hundred seventeen thousand, four hundred".