3973780 has 12 divisors (see below), whose sum is σ = 8344980. Its totient is φ = 1589504.

The previous prime is 3973757. The next prime is 3973787. The reversal of 3973780 is 873793.

It can be written as a sum of positive squares in 2 ways, for example, as 1110916 + 2862864 = 1054^2 + 1692^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3973787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99325 + ... + 99364.

It is an arithmetic number, because the mean of its divisors is an integer number (695415).

Almost surely, 2^3973780 is an apocalyptic number.

It is an amenable number.

3973780 is an abundant number, since it is smaller than the sum of its proper divisors (4371200).

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

3973780 is a wasteful number, since it uses less digits than its factorization.

3973780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198698 (or 198696 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 3973780 is about 1993.4342226419. The cubic root of 3973780 is about 158.3924974340.

It can be divided in two parts, 3973 and 780, that added together give a triangular number (4753 = T₉₇).

The spelling of 3973780 in words is "three million, nine hundred seventy-three thousand, seven hundred eighty".