3640578 has 48 divisors (see below), whose sum is σ = 8069376. Its totient is φ = 1092960.

The previous prime is 3640577. The next prime is 3640589. The reversal of 3640578 is 8750463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640577) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98376 + ... + 98412.

It is an arithmetic number, because the mean of its divisors is an integer number (168112).

Almost surely, 2^3640578 is an apocalyptic number.

3640578 is an abundant number, since it is smaller than the sum of its proper divisors (4428798).

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

3640578 is a wasteful number, since it uses less digits than its factorization.

3640578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 3640578 is about 1908.0298739800. The cubic root of 3640578 is about 153.8355753367.

The spelling of 3640578 in words is "three million, six hundred forty thousand, five hundred seventy-eight".