1163890 has 32 divisors (see below), whose sum is σ = 2580480. Its totient is φ = 368064.

The previous prime is 1163879. The next prime is 1163891. The reversal of 1163890 is 983611.

1163890 = 65² + 66² + ... + 155².

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1163891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271 + ... + 1549.

It is an arithmetic number, because the mean of its divisors is an integer number (80640).

2^1163890 is an apocalyptic number.

1163890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1163890 is an abundant number, since it is smaller than the sum of its proper divisors (1416590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1163890 is a wasteful number, since it uses less digits than its factorization.

1163890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1163890 is about 1078.8373371366. The cubic root of 1163890 is about 105.1890773067.

The spelling of 1163890 in words is "one million, one hundred sixty-three thousand, eight hundred ninety".