3928402 has 12 divisors (see below), whose sum is σ = 6220206. Its totient is φ = 1860480.

The previous prime is 3928399. The next prime is 3928417. The reversal of 3928402 is 2048293.

It can be written as a sum of positive squares in only one way, i.e., 2989441 + 938961 = 1729^2 + 969^2 .

It is a super-3 number, since 3×3928402³ (a number of 21 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1999 + ... + 3442.

Almost surely, 2^3928402 is an apocalyptic number.

3928402 is a deficient number, since it is larger than the sum of its proper divisors (2291804).

3928402 is a wasteful number, since it uses less digits than its factorization.

3928402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5481 (or 5462 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 3928402 is about 1982.0196769962. The cubic root of 3928402 is about 157.7872744767.

It can be divided in two parts, 39 and 28402, that added together give a triangular number (28441 = T₂₃₈).

The spelling of 3928402 in words is "three million, nine hundred twenty-eight thousand, four hundred two".