3931902 has 40 divisors (see below), whose sum is σ = 9493176. Its totient is φ = 1209168.

The previous prime is 3931891. The next prime is 3931927. The reversal of 3931902 is 2091393.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1173 + ... + 3039.

Almost surely, 2^3931902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3931902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4746588).

3931902 is an abundant number, since it is smaller than the sum of its proper divisors (5561274).

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

3931902 is a wasteful number, since it uses less digits than its factorization.

3931902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894 (or 1885 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 3931902 is about 1982.9024181739. The cubic root of 3931902 is about 157.8341206270.

The spelling of 3931902 in words is "three million, nine hundred thirty-one thousand, nine hundred two".