10981540 has 24 divisors (see below), whose sum is σ = 23123520. Its totient is φ = 4380768.

The previous prime is 10981513. The next prime is 10981543. The reversal of 10981540 is 4518901.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 10981499 and 10981508.

It is not an unprimeable number, because it can be changed into a prime (10981543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14409 + ... + 15151.

It is an arithmetic number, because the mean of its divisors is an integer number (963480).

Almost surely, 2^10981540 is an apocalyptic number.

10981540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10981540 is an abundant number, since it is smaller than the sum of its proper divisors (12141980).

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

10981540 is a wasteful number, since it uses less digits than its factorization.

10981540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491 (or 1489 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 10981540 is about 3313.8406720903. The cubic root of 10981540 is about 222.2735313004.

The spelling of 10981540 in words is "ten million, nine hundred eighty-one thousand, five hundred forty".