4091640 has 64 divisors (see below), whose sum is σ = 14031360. Its totient is φ = 935040.

The previous prime is 4091627. The next prime is 4091657. The reversal of 4091640 is 461904.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 4091640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1596 + ... + 3275.

It is an arithmetic number, because the mean of its divisors is an integer number (219240).

Almost surely, 2^4091640 is an apocalyptic number.

4091640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4091640 is an abundant number, since it is smaller than the sum of its proper divisors (9939720).

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

4091640 is a wasteful number, since it uses less digits than its factorization.

4091640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4892 (or 4888 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 4091640 is about 2022.7802648830. The cubic root of 4091640 is about 159.9432090114.

The spelling of 4091640 in words is "four million, ninety-one thousand, six hundred forty".