1123998440 has 16 divisors (see below), whose sum is σ = 2528996580. Its totient is φ = 449599360.

The previous prime is 1123998433. The next prime is 1123998451. The reversal of 1123998440 is 448993211.

It can be written as a sum of positive squares in 2 ways, for example, as 1077021124 + 46977316 = 32818^2 + 6854^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14049941 + ... + 14050020.

Almost surely, 2^1123998440 is an apocalyptic number.

1123998440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123998440 is an abundant number, since it is smaller than the sum of its proper divisors (1404998140).

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

1123998440 is a wasteful number, since it uses less digits than its factorization.

1123998440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28099972 (or 28099968 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1123998440 is about 33526.0859630229. The cubic root of 1123998440 is about 1039.7331785918.

The spelling of 1123998440 in words is "one billion, one hundred twenty-three million, nine hundred ninety-eight thousand, four hundred forty".