1089158878 has 4 divisors (see below), whose sum is σ = 1633738320. Its totient is φ = 544579438.

The previous prime is 1089158857. The next prime is 1089158879. The reversal of 1089158878 is 8788519801.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089158879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272289718 + ... + 272289721.

It is an arithmetic number, because the mean of its divisors is an integer number (408434580).

Almost surely, 2^1089158878 is an apocalyptic number.

1089158878 is a deficient number, since it is larger than the sum of its proper divisors (544579442).

1089158878 is an equidigital number, since it uses as much as digits as its factorization.

1089158878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544579441.

The product of its (nonzero) digits is 1290240, while the sum is 55.

The square root of 1089158878 is about 33002.4071546304. The cubic root of 1089158878 is about 1028.8776784592.

The spelling of 1089158878 in words is "one billion, eighty-nine million, one hundred fifty-eight thousand, eight hundred seventy-eight".