4206640 has 20 divisors (see below), whose sum is σ = 9780624. Its totient is φ = 1682624.

The previous prime is 4206613. The next prime is 4206659. The reversal of 4206640 is 466024.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26212 + ... + 26371.

Almost surely, 2^4206640 is an apocalyptic number.

4206640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4206640 is an abundant number, since it is smaller than the sum of its proper divisors (5573984).

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

4206640 is a wasteful number, since it uses less digits than its factorization.

4206640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52596 (or 52590 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 4206640 is about 2051.0095075353. The cubic root of 4206640 is about 161.4278449635.

The spelling of 4206640 in words is "four million, two hundred six thousand, six hundred forty".