3640658 has 8 divisors (see below), whose sum is σ = 6241152. Its totient is φ = 1560276.

The previous prime is 3640649. The next prime is 3640661. The reversal of 3640658 is 8560463.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130010 + ... + 130037.

It is an arithmetic number, because the mean of its divisors is an integer number (780144).

Almost surely, 2^3640658 is an apocalyptic number.

3640658 is a deficient number, since it is larger than the sum of its proper divisors (2600494).

3640658 is a wasteful number, since it uses less digits than its factorization.

3640658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260056.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 3640658 is about 1908.0508378971. The cubic root of 3640658 is about 153.8367021501.

The spelling of 3640658 in words is "three million, six hundred forty thousand, six hundred fifty-eight".