3973806 has 16 divisors (see below), whose sum is σ = 8830800. Its totient is φ = 1324584.

The previous prime is 3973787. The next prime is 3973807. The reversal of 3973806 is 6083793.

It is a super-2 number, since 2×3973806² = 31582268251272, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3973807) 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, 36741 + ... + 36848.

It is an arithmetic number, because the mean of its divisors is an integer number (551925).

Almost surely, 2^3973806 is an apocalyptic number.

3973806 is an abundant number, since it is smaller than the sum of its proper divisors (4856994).

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

3973806 is a wasteful number, since it uses less digits than its factorization.

3973806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73600 (or 73594 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 3973806 is about 1993.4407440403. The cubic root of 3973806 is about 158.3928428814.

It can be divided in two parts, 397380 and 6, that added together give a triangular number (397386 = T₈₉₁).

The spelling of 3973806 in words is "three million, nine hundred seventy-three thousand, eight hundred six".