1115040400 has 30 divisors (see below), whose sum is σ = 2678885522. Its totient is φ = 446016000.

The previous prime is 1115040389. The next prime is 1115040413. The reversal of 1115040400 is 40405111.

It can be written as a sum of positive squares in 3 ways, for example, as 323856016 + 791184384 = 17996^2 + 28128^2 .

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

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, 1393401 + ... + 1394200.

Almost surely, 2^1115040400 is an apocalyptic number.

1115040400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1115040400 is an abundant number, since it is smaller than the sum of its proper divisors (1563845122).

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

1115040400 is a wasteful number, since it uses less digits than its factorization.

1115040400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787619 (or 2787608 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1115040400 is about 33392.2206509241. The cubic root of 1115040400 is about 1036.9636536824.

Adding to 1115040400 its reverse (40405111), we get a palindrome (1155445511).

The spelling of 1115040400 in words is "one billion, one hundred fifteen million, forty thousand, four hundred".