1131554788 has 48 divisors (see below), whose sum is σ = 2455092864. Its totient is φ = 444360960.

The previous prime is 1131554779. The next prime is 1131554789. The reversal of 1131554788 is 8874551311.

It is not an unprimeable number, because it can be changed into a prime (1131554789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38523 + ... + 61213.

It is an arithmetic number, because the mean of its divisors is an integer number (51147768).

Almost surely, 2^1131554788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131554788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1227546432).

1131554788 is an abundant number, since it is smaller than the sum of its proper divisors (1323538076).

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

1131554788 is a wasteful number, since it uses less digits than its factorization.

1131554788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22852 (or 22850 counting only the distinct ones).

The product of its digits is 134400, while the sum is 43.

The square root of 1131554788 is about 33638.5907552620. The cubic root of 1131554788 is about 1042.0579283374.

The spelling of 1131554788 in words is "one billion, one hundred thirty-one million, five hundred fifty-four thousand, seven hundred eighty-eight".