3949402 has 4 divisors (see below), whose sum is σ = 5924106. Its totient is φ = 1974700.

The previous prime is 3949391. The next prime is 3949409. The reversal of 3949402 is 2049493.

3949402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 2047761 + 1901641 = 1431^2 + 1379^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (3949409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987349 + ... + 987352.

Almost surely, 2^3949402 is an apocalyptic number.

3949402 is a deficient number, since it is larger than the sum of its proper divisors (1974704).

3949402 is a wasteful number, since it uses less digits than its factorization.

3949402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974703.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 3949402 is about 1987.3102425137. The cubic root of 3949402 is about 158.0679353212.

The spelling of 3949402 in words is "three million, nine hundred forty-nine thousand, four hundred two".