10531640 has 64 divisors (see below), whose sum is σ = 28036800. Its totient is φ = 3483648.

The previous prime is 10531639. The next prime is 10531649. The reversal of 10531640 is 4613501.

It is a super-2 number, since 2×10531640² = 221830882179200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10531649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7472 + ... + 8768.

It is an arithmetic number, because the mean of its divisors is an integer number (438075).

Almost surely, 2^10531640 is an apocalyptic number.

10531640 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 10531640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14018400).

10531640 is an abundant number, since it is smaller than the sum of its proper divisors (17505160).

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

10531640 is a wasteful number, since it uses less digits than its factorization.

10531640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344 (or 1340 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 10531640 is about 3245.2488348353. The cubic root of 10531640 is about 219.1956856202.

The spelling of 10531640 in words is "ten million, five hundred thirty-one thousand, six hundred forty".