4139640 has 64 divisors (see below), whose sum is σ = 13802400. Its totient is φ = 1103616.

The previous prime is 4139627. The next prime is 4139659. The reversal of 4139640 is 469314.

4139640 is a `hidden beast` number, since 4 + 13 + 9 + 640 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 837 + ... + 2996.

Almost surely, 2^4139640 is an apocalyptic number.

4139640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4139640 is an abundant number, since it is smaller than the sum of its proper divisors (9662760).

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

4139640 is a wasteful number, since it uses less digits than its factorization.

4139640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3853 (or 3843 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 4139640 is about 2034.6105278406. The cubic root of 4139640 is about 160.5662229999.

The spelling of 4139640 in words is "four million, one hundred thirty-nine thousand, six hundred forty".