14531640 has 64 divisors (see below), whose sum is σ = 44150400. Its totient is φ = 3825792.

The previous prime is 14531633. The next prime is 14531659. The reversal of 14531640 is 4613541.

It is a super-2 number, since 2×14531640² = 422337122179200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 14531640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9231 + ... + 10689.

It is an arithmetic number, because the mean of its divisors is an integer number (689850).

Almost surely, 2^14531640 is an apocalyptic number.

14531640 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 14531640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22075200).

14531640 is an abundant number, since it is smaller than the sum of its proper divisors (29618760).

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

14531640 is a wasteful number, since it uses less digits than its factorization.

14531640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556 (or 1552 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 14531640 is about 3812.0388245662. The cubic root of 14531640 is about 244.0271850030.

The spelling of 14531640 in words is "fourteen million, five hundred thirty-one thousand, six hundred forty".