1185331428 has 24 divisors (see below), whose sum is σ = 3073081760. Its totient is φ = 395110440.

The previous prime is 1185331423. The next prime is 1185331453. The reversal of 1185331428 is 8241335811.

1185331428 is a `hidden beast` number, since 118 + 533 + 1 + 4 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1185331392 and 1185331401.

It is not an unprimeable number, because it can be changed into a prime (1185331423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5487538 + ... + 5487753.

Almost surely, 2^1185331428 is an apocalyptic number.

1185331428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1185331428 is an abundant number, since it is smaller than the sum of its proper divisors (1887750332).

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

1185331428 is a wasteful number, since it uses less digits than its factorization.

1185331428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10975304 (or 10975296 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 1185331428 is about 34428.6425523865. The cubic root of 1185331428 is about 1058.3108935632.

The spelling of 1185331428 in words is "one billion, one hundred eighty-five million, three hundred thirty-one thousand, four hundred twenty-eight".