1220430400 has 84 divisors (see below), whose sum is σ = 3432056128. Its totient is φ = 418429440.

The previous prime is 1220430383. The next prime is 1220430427. The reversal of 1220430400 is 40340221.

It is a super-2 number, since 2×1220430400² = 2978900722488320000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43284 + ... + 65683.

Almost surely, 2^1220430400 is an apocalyptic number.

1220430400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220430400 is an abundant number, since it is smaller than the sum of its proper divisors (2211625728).

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

1220430400 is a wasteful number, since it uses less digits than its factorization.

1220430400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108996 (or 108981 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1220430400 is about 34934.6590079251. The cubic root of 1220430400 is about 1068.6553698005.

Adding to 1220430400 its reverse (40340221), we get a palindrome (1260770621).

The spelling of 1220430400 in words is "one billion, two hundred twenty million, four hundred thirty thousand, four hundred".