14646640 has 40 divisors (see below), whose sum is σ = 34247808. Its totient is φ = 5825280.

The previous prime is 14646631. The next prime is 14646659. The reversal of 14646640 is 4664641.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17430 + ... + 18250.

Almost surely, 2^14646640 is an apocalyptic number.

14646640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14646640 is an abundant number, since it is smaller than the sum of its proper divisors (19601168).

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

14646640 is a wasteful number, since it uses less digits than its factorization.

14646640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 14646640 is about 3827.0928914778. The cubic root of 14646640 is about 244.6692190220.

The spelling of 14646640 in words is "fourteen million, six hundred forty-six thousand, six hundred forty".