3643974 has 16 divisors (see below), whose sum is σ = 8097840. Its totient is φ = 1214640.

The previous prime is 3643973. The next prime is 3644021. The reversal of 3643974 is 4793463.

3643974 is a `hidden beast` number, since 3 + 643 + 9 + 7 + 4 = 666.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33687 + ... + 33794.

It is an arithmetic number, because the mean of its divisors is an integer number (506115).

Almost surely, 2^3643974 is an apocalyptic number.

3643974 is an abundant number, since it is smaller than the sum of its proper divisors (4453866).

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

3643974 is a wasteful number, since it uses less digits than its factorization.

3643974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67492 (or 67486 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 3643974 is about 1908.9195897156. The cubic root of 3643974 is about 153.8833940490.

The spelling of 3643974 in words is "three million, six hundred forty-three thousand, nine hundred seventy-four".