10988820 has 72 divisors (see below), whose sum is σ = 34168680. Its totient is φ = 2856960.

The previous prime is 10988819. The next prime is 10988827. The reversal of 10988820 is 2888901.

10988820 = T₂₈₁ + T₂₈₂ + ... + T₄₄₄.

10988820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 138384 + 10850436 = 372^2 + 3294^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10988827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6636 + ... + 8124.

It is an arithmetic number, because the mean of its divisors is an integer number (474565).

Almost surely, 2^10988820 is an apocalyptic number.

10988820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10988820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17084340).

10988820 is an abundant number, since it is smaller than the sum of its proper divisors (23179860).

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

10988820 is a wasteful number, since it uses less digits than its factorization.

10988820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545 (or 1540 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 10988820 is about 3314.9389134643. The cubic root of 10988820 is about 222.3226377665.

The spelling of 10988820 in words is "ten million, nine hundred eighty-eight thousand, eight hundred twenty".