1188989530 has 8 divisors (see below), whose sum is σ = 2140181172. Its totient is φ = 475595808.

The previous prime is 1188989513. The next prime is 1188989551. The reversal of 1188989530 is 359898811.

It can be written as a sum of positive squares in 2 ways, for example, as 1115493201 + 73496329 = 33399^2 + 8573^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1188989530² = 2827392204899241800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59449467 + ... + 59449486.

Almost surely, 2^1188989530 is an apocalyptic number.

1188989530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1188989530 is a deficient number, since it is larger than the sum of its proper divisors (951191642).

1188989530 is a wasteful number, since it uses less digits than its factorization.

1188989530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118898960.

The product of its (nonzero) digits is 622080, while the sum is 52.

The square root of 1188989530 is about 34481.7274799277. The cubic root of 1188989530 is about 1059.3984750181.

The spelling of 1188989530 in words is "one billion, one hundred eighty-eight million, nine hundred eighty-nine thousand, five hundred thirty".