11288890 has 8 divisors (see below), whose sum is σ = 20320020. Its totient is φ = 4515552.

The previous prime is 11288887. The next prime is 11288923. The reversal of 11288890 is 9888211.

11288890 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in 2 ways, for example, as 11068929 + 219961 = 3327^2 + 469^2 .

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

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, 564435 + ... + 564454.

Almost surely, 2^11288890 is an apocalyptic number.

11288890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11288890 is a deficient number, since it is larger than the sum of its proper divisors (9031130).

11288890 is a wasteful number, since it uses less digits than its factorization.

11288890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128896.

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 11288890 is about 3359.8943435769. The cubic root of 11288890 is about 224.3281356850.

The spelling of 11288890 in words is "eleven million, two hundred eighty-eight thousand, eight hundred ninety".