3921850 has 12 divisors (see below), whose sum is σ = 7294734. Its totient is φ = 1568720.

The previous prime is 3921823. The next prime is 3921851. The reversal of 3921850 is 581293.

It can be written as a sum of positive squares in 3 ways, for example, as 2331729 + 1590121 = 1527^2 + 1261^2 .

It is not an unprimeable number, because it can be changed into a prime (3921851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39169 + ... + 39268.

Almost surely, 2^3921850 is an apocalyptic number.

3921850 is a deficient number, since it is larger than the sum of its proper divisors (3372884).

3921850 is a wasteful number, since it uses less digits than its factorization.

3921850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78449 (or 78444 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 3921850 is about 1980.3661277653. The cubic root of 3921850 is about 157.6995036299.

The spelling of 3921850 in words is "three million, nine hundred twenty-one thousand, eight hundred fifty".