1131047400 has 576 divisors, whose sum is σ = 4518996480. Its totient is φ = 232243200.

The previous prime is 1131047399. The next prime is 1131047419. The reversal of 1131047400 is 47401311.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 15493764 + ... + 15493836.

It is an arithmetic number, because the mean of its divisors is an integer number (7845480).

Almost surely, 2^1131047400 is an apocalyptic number.

1131047400 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 1131047400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2259498240).

1131047400 is an abundant number, since it is smaller than the sum of its proper divisors (3387949080).

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

1131047400 is a wasteful number, since it uses less digits than its factorization.

1131047400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1131047400 is about 33631.0481549416. The cubic root of 1131047400 is about 1041.9021524850.

Adding to 1131047400 its reverse (47401311), we get a palindrome (1178448711).

The spelling of 1131047400 in words is "one billion, one hundred thirty-one million, forty-seven thousand, four hundred".