11644890 has 16 divisors (see below), whose sum is σ = 27947808. Its totient is φ = 3105296.

The previous prime is 11644859. The next prime is 11644901. The reversal of 11644890 is 9844611.

It is a super-2 number, since 2×11644890² = 271206926224200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194052 + ... + 194111.

It is an arithmetic number, because the mean of its divisors is an integer number (1746738).

Almost surely, 2^11644890 is an apocalyptic number.

11644890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11644890 is an abundant number, since it is smaller than the sum of its proper divisors (16302918).

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

11644890 is a wasteful number, since it uses less digits than its factorization.

11644890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388173.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 11644890 is about 3412.4609887880. The cubic root of 11644890 is about 226.6618679299.

The spelling of 11644890 in words is "eleven million, six hundred forty-four thousand, eight hundred ninety".