1123444100 has 18 divisors (see below), whose sum is σ = 2437873914. Its totient is φ = 449377600.

The previous prime is 1123444097. The next prime is 1123444129. The reversal of 1123444100 is 14443211.

It can be written as a sum of positive squares in 3 ways, for example, as 177635584 + 945808516 = 13328^2 + 30754^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5617121 + ... + 5617320.

Almost surely, 2^1123444100 is an apocalyptic number.

1123444100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123444100 is an abundant number, since it is smaller than the sum of its proper divisors (1314429814).

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

1123444100 is a wasteful number, since it uses less digits than its factorization.

1123444100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11234455 (or 11234448 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1123444100 is about 33517.8176497218. The cubic root of 1123444100 is about 1039.5622232929.

Adding to 1123444100 its reverse (14443211), we get a palindrome (1137887311).

It can be divided in two parts, 112 and 3444100, that multiplied together give a triangular number (385739200 = T₂₇₇₇₅).

The spelling of 1123444100 in words is "one billion, one hundred twenty-three million, four hundred forty-four thousand, one hundred".