10999988 has 12 divisors (see below), whose sum is σ = 19437600. Its totient is φ = 5446392.

The previous prime is 10999987. The next prime is 10999997. The reversal of 10999988 is 88999901.

It is a super-4 number, since 4×10999988⁴ (a number of 29 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10999987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12938 + ... + 13761.

It is an arithmetic number, because the mean of its divisors is an integer number (1619800).

Almost surely, 2^10999988 is an apocalyptic number.

It is an amenable number.

10999988 is a deficient number, since it is larger than the sum of its proper divisors (8437612).

10999988 is a wasteful number, since it uses less digits than its factorization.

10999988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26806 (or 26804 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 53.

The square root of 10999988 is about 3316.6229812868. The cubic root of 10999988 is about 222.3979281849.

The spelling of 10999988 in words is "ten million, nine hundred ninety-nine thousand, nine hundred eighty-eight".