11642890 has 24 divisors (see below), whose sum is σ = 24379812. Its totient is φ = 3991680.

The previous prime is 11642879. The next prime is 11642921. The reversal of 11642890 is 9824611.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11621281 + 21609 = 3409^2 + 147^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11391 + ... + 12370.

Almost surely, 2^11642890 is an apocalyptic number.

11642890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11642890 is an abundant number, since it is smaller than the sum of its proper divisors (12736922).

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

11642890 is a wasteful number, since it uses less digits than its factorization.

11642890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23782 (or 23775 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 11642890 is about 3412.1679325614. The cubic root of 11642890 is about 226.6488908590.

The spelling of 11642890 in words is "eleven million, six hundred forty-two thousand, eight hundred ninety".