10997820 has 36 divisors (see below), whose sum is σ = 33360600. Its totient is φ = 2932704.

The previous prime is 10997813. The next prime is 10997821. The reversal of 10997820 is 2879901.

It is a happy number.

10997820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

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 (10997821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30370 + ... + 30729.

Almost surely, 2^10997820 is an apocalyptic number.

10997820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10997820 is an abundant number, since it is smaller than the sum of its proper divisors (22362780).

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

10997820 is a wasteful number, since it uses less digits than its factorization.

10997820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61114 (or 61109 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 10997820 is about 3316.2961267052. The cubic root of 10997820 is about 222.3833163390.

The spelling of 10997820 in words is "ten million, nine hundred ninety-seven thousand, eight hundred twenty".