1223000400 has 120 divisors (see below), whose sum is σ = 4148198784. Its totient is φ = 306944000.

The previous prime is 1223000393. The next prime is 1223000419. The reversal of 1223000400 is 40003221.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9576 + ... + 50375.

Almost surely, 2^1223000400 is an apocalyptic number.

1223000400 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 1223000400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2074099392).

1223000400 is an abundant number, since it is smaller than the sum of its proper divisors (2925198384).

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

1223000400 is a wasteful number, since it uses less digits than its factorization.

1223000400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59989 (or 59978 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 1223000400 is about 34971.4226190471. The cubic root of 1223000400 is about 1069.4049738523.

Adding to 1223000400 its reverse (40003221), we get a palindrome (1263003621).

The spelling of 1223000400 in words is "one billion, two hundred twenty-three million, four hundred", and thus it is an aban number.