1189307890 has 32 divisors (see below), whose sum is σ = 2173236480. Its totient is φ = 468547200.

The previous prime is 1189307857. The next prime is 1189307923. The reversal of 1189307890 is 987039811.

It is an interprime number because it is at equal distance from previous prime (1189307857) and next prime (1189307923).

It is a self number, because there is not a number n which added to its sum of digits gives 1189307890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238725 + ... + 243655.

It is an arithmetic number, because the mean of its divisors is an integer number (67913640).

Almost surely, 2^1189307890 is an apocalyptic number.

1189307890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1189307890 is a deficient number, since it is larger than the sum of its proper divisors (983928590).

1189307890 is a wasteful number, since it uses less digits than its factorization.

1189307890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5298.

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 1189307890 is about 34486.3435289971. The cubic root of 1189307890 is about 1059.4930202860.

The spelling of 1189307890 in words is "one billion, one hundred eighty-nine million, three hundred seven thousand, eight hundred ninety".