1222340400 has 90 divisors (see below), whose sum is σ = 4241873220. Its totient is φ = 325956480.

The previous prime is 1222340393. The next prime is 1222340407. The reversal of 1222340400 is 40432221.

1222340400 is a `hidden beast` number, since 1 + 2 + 223 + 40 + 400 = 666.

It is an interprime number because it is at equal distance from previous prime (1222340393) and next prime (1222340407).

It is a tau number, because it is divible by the number of its divisors (90).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1222340407) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 166170 + ... + 173369.

Almost surely, 2^1222340400 is an apocalyptic number.

1222340400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222340400 is an abundant number, since it is smaller than the sum of its proper divisors (3019532820).

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

1222340400 is a wasteful number, since it uses less digits than its factorization.

1222340400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339563 (or 339549 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1222340400 is about 34961.9850695008. The cubic root of 1222340400 is about 1069.2125688225.

Adding to 1222340400 its reverse (40432221), we get a palindrome (1262772621).

The spelling of 1222340400 in words is "one billion, two hundred twenty-two million, three hundred forty thousand, four hundred".