1155989434 has 4 divisors (see below), whose sum is σ = 1733984154. Its totient is φ = 577994716.

The previous prime is 1155989399. The next prime is 1155989437. The reversal of 1155989434 is 4349895511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1082081025 + 73908409 = 32895^2 + 8597^2 .

It is not an unprimeable number, because it can be changed into a prime (1155989437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288997357 + ... + 288997360.

Almost surely, 2^1155989434 is an apocalyptic number.

1155989434 is a deficient number, since it is larger than the sum of its proper divisors (577994720).

1155989434 is an equidigital number, since it uses as much as digits as its factorization.

1155989434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577994719.

The product of its digits is 777600, while the sum is 49.

The square root of 1155989434 is about 33999.8446172920. The cubic root of 1155989434 is about 1049.5052647370.

The spelling of 1155989434 in words is "one billion, one hundred fifty-five million, nine hundred eighty-nine thousand, four hundred thirty-four".