3733821 has 48 divisors (see below), whose sum is σ = 6849024. Its totient is φ = 1907712.

The previous prime is 3733801. The next prime is 3733831. The reversal of 3733821 is 1283373.

It is not a de Polignac number, because 3733821 - 2⁵ = 3733789 is a prime.

3733821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3733801) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38445 + ... + 38541.

It is an arithmetic number, because the mean of its divisors is an integer number (142688).

Almost surely, 2^3733821 is an apocalyptic number.

It is an amenable number.

3733821 is a deficient number, since it is larger than the sum of its proper divisors (3115203).

3733821 is a wasteful number, since it uses less digits than its factorization.

3733821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 167 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 3733821 is about 1932.3097577769. The cubic root of 3733821 is about 155.1378724700.

It can be divided in two parts, 3733 and 821, that added together give a palindrome (4554).

The spelling of 3733821 in words is "three million, seven hundred thirty-three thousand, eight hundred twenty-one".