4091690 has 32 divisors (see below), whose sum is σ = 7755264. Its totient is φ = 1552320.

The previous prime is 4091671. The next prime is 4091693. The reversal of 4091690 is 961904.

It is a super-2 number, since 2×4091690² = 33483854112200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4091693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20672 + ... + 20868.

It is an arithmetic number, because the mean of its divisors is an integer number (242352).

Almost surely, 2^4091690 is an apocalyptic number.

4091690 is a deficient number, since it is larger than the sum of its proper divisors (3663574).

4091690 is a wasteful number, since it uses less digits than its factorization.

4091690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 4091690 is about 2022.7926240720. The cubic root of 4091690 is about 159.9438605129.

The spelling of 4091690 in words is "four million, ninety-one thousand, six hundred ninety".