14731640 has 64 divisors (see below), whose sum is σ = 41333760. Its totient is φ = 4590720.

The previous prime is 14731609. The next prime is 14731643. The reversal of 14731640 is 4613741.

14731640 = 389² + 390² + ... + 468².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14731643) 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 15 ways as a sum of consecutive naturals, for example, 689 + ... + 5471.

It is an arithmetic number, because the mean of its divisors is an integer number (645840).

Almost surely, 2^14731640 is an apocalyptic number.

14731640 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 14731640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20666880).

14731640 is an abundant number, since it is smaller than the sum of its proper divisors (26602120).

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

14731640 is a wasteful number, since it uses less digits than its factorization.

14731640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4812 (or 4808 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 14731640 is about 3838.1818612463. The cubic root of 14731640 is about 245.1416090968.

It can be divided in two parts, 1473 and 1640, that added together give a palindrome (3113).

The spelling of 14731640 in words is "fourteen million, seven hundred thirty-one thousand, six hundred forty".