3902 has 4 divisors (see below), whose sum is σ = 5856. Its totient is φ = 1950.

The previous prime is 3889. The next prime is 3907. The reversal of 3902 is 2093.

Added to its reverse (2093) it gives a triangular number (5995 = T₁₀₉).

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3907) by changing a digit.

3902 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974 + ... + 977.

It is an arithmetic number, because the mean of its divisors is an integer number (1464).

2³⁹⁰² is an apocalyptic number.

3902 is a deficient number, since it is larger than the sum of its proper divisors (1954).

3902 is a wasteful number, since it uses less digits than its factorization.

3902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 3902 is about 62.4659907470. The cubic root of 3902 is about 15.7432994089.

Adding to 3902 its sum of digits (14), we get a triangular number (3916 = T₈₈).

Adding to 3902 its reverse (2093), we get a palindrome (5995).

It can be divided in two parts, 390 and 2, that multiplied together give a triangular number (780 = T₃₉).

The spelling of 3902 in words is "three thousand, nine hundred two".