3994090 has 8 divisors (see below), whose sum is σ = 7189380. Its totient is φ = 1597632.

The previous prime is 3994079. The next prime is 3994103. The reversal of 3994090 is 904993.

It can be written as a sum of positive squares in 2 ways, for example, as 3323329 + 670761 = 1823^2 + 819^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199695 + ... + 199714.

Almost surely, 2^3994090 is an apocalyptic number.

3994090 is a deficient number, since it is larger than the sum of its proper divisors (3195290).

3994090 is a wasteful number, since it uses less digits than its factorization.

3994090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399416.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 3994090 is about 1998.5219538449. The cubic root of 3994090 is about 158.6618871600.

It can be divided in two parts, 399 and 4090, that added together give a square (4489 = 67²).

The spelling of 3994090 in words is "three million, nine hundred ninety-four thousand, ninety".