10981720 has 32 divisors (see below), whose sum is σ = 25563600. Its totient is φ = 4240768.

The previous prime is 10981703. The next prime is 10981723. The reversal of 10981720 is 2718901.

10981720 = 200² + 201² + ... + 344².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10981723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3574 + ... + 5893.

Almost surely, 2^10981720 is an apocalyptic number.

10981720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10981720 is an abundant number, since it is smaller than the sum of its proper divisors (14581880).

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

10981720 is a wasteful number, since it uses less digits than its factorization.

10981720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9507 (or 9503 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 10981720 is about 3313.8678307983. The cubic root of 10981720 is about 222.2747457329.

The spelling of 10981720 in words is "ten million, nine hundred eighty-one thousand, seven hundred twenty".