3904489 has 8 divisors (see below), whose sum is σ = 3987720. Its totient is φ = 3822336.

The previous prime is 3904487. The next prime is 3904493. The reversal of 3904489 is 9844093.

3904489 = 127² + 128² + ... + 239².

It can be written as a sum of positive squares in 4 ways, for example, as 43264 + 3861225 = 208^2 + 1965^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3904489 - 2¹ = 3904487 is a prime.

It is a super-2 number, since 2×3904489² = 30490068702242, which contains 22 as substring.

It is a Duffinian number.

3904489 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3904487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12159 + ... + 12475.

It is an arithmetic number, because the mean of its divisors is an integer number (498465).

Almost surely, 2^3904489 is an apocalyptic number.

It is an amenable number.

3904489 is a deficient number, since it is larger than the sum of its proper divisors (83231).

3904489 is a wasteful number, since it uses less digits than its factorization.

3904489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 3904489 is about 1975.9779857073. The cubic root of 3904489 is about 157.4664613226.

The spelling of 3904489 in words is "three million, nine hundred four thousand, four hundred eighty-nine".