3640726 has 8 divisors (see below), whose sum is σ = 5608800. Its totient is φ = 1771128.

The previous prime is 3640717. The next prime is 3640753. The reversal of 3640726 is 6270463.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 3640694 and 3640703.

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 3 ways as a sum of consecutive naturals, for example, 24526 + ... + 24673.

It is an arithmetic number, because the mean of its divisors is an integer number (701100).

Almost surely, 2^3640726 is an apocalyptic number.

3640726 is a deficient number, since it is larger than the sum of its proper divisors (1968074).

3640726 is a wasteful number, since it uses less digits than its factorization.

3640726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49238.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 3640726 is about 1908.0686570457. The cubic root of 3640726 is about 153.8376599285.

The spelling of 3640726 in words is "three million, six hundred forty thousand, seven hundred twenty-six".