4067640 has 48 divisors (see below), whose sum is σ = 13221000. Its totient is φ = 1084608.

The previous prime is 4067639. The next prime is 4067647. The reversal of 4067640 is 467604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4067647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5290 + ... + 6009.

Almost surely, 2^4067640 is an apocalyptic number.

4067640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4067640 is an abundant number, since it is smaller than the sum of its proper divisors (9153360).

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

4067640 is a wasteful number, since it uses less digits than its factorization.

4067640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11316 (or 11309 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 4067640 is about 2016.8391110845. The cubic root of 4067640 is about 159.6298736173.

The spelling of 4067640 in words is "four million, sixty-seven thousand, six hundred forty".