1161204388 has 12 divisors (see below), whose sum is σ = 2032865100. Its totient is φ = 580385792.

The previous prime is 1161204367. The next prime is 1161204409. The reversal of 1161204388 is 8834021611.

It is an interprime number because it is at equal distance from previous prime (1161204367) and next prime (1161204409).

It can be written as a sum of positive squares in 2 ways, for example, as 812934144 + 348270244 = 28512^2 + 18662^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41713 + ... + 63736.

It is an arithmetic number, because the mean of its divisors is an integer number (169405425).

Almost surely, 2^1161204388 is an apocalyptic number.

It is an amenable number.

1161204388 is a deficient number, since it is larger than the sum of its proper divisors (871660712).

1161204388 is a wasteful number, since it uses less digits than its factorization.

1161204388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108206 (or 108204 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 1161204388 is about 34076.4491694777. The cubic root of 1161204388 is about 1051.0810899944.

Adding to 1161204388 its reverse (8834021611), we get a palindrome (9995225999).

The spelling of 1161204388 in words is "one billion, one hundred sixty-one million, two hundred four thousand, three hundred eighty-eight".