3904442 has 4 divisors (see below), whose sum is σ = 5856666. Its totient is φ = 1952220.

The previous prime is 3904409. The next prime is 3904447. The reversal of 3904442 is 2444093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2444093 = 67 ⋅36479.

It can be written as a sum of positive squares in only one way, i.e., 3200521 + 703921 = 1789^2 + 839^2 .

It is not an unprimeable number, because it can be changed into a prime (3904447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976109 + ... + 976112.

Almost surely, 2^3904442 is an apocalyptic number.

3904442 is a deficient number, since it is larger than the sum of its proper divisors (1952224).

3904442 is a wasteful number, since it uses less digits than its factorization.

3904442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952223.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 3904442 is about 1975.9660928265. The cubic root of 3904442 is about 157.4658294897.

The spelling of 3904442 in words is "three million, nine hundred four thousand, four hundred forty-two".