4049890 has 16 divisors (see below), whose sum is σ = 7850808. Its totient is φ = 1495296.

The previous prime is 4049887. The next prime is 4049891. The reversal of 4049890 is 989404.

It can be written as a sum of positive squares in 4 ways, for example, as 2013561 + 2036329 = 1419^2 + 1427^2 .

It is not an unprimeable number, because it can be changed into a prime (4049891) 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, 15447 + ... + 15706.

Almost surely, 2^4049890 is an apocalyptic number.

4049890 is a deficient number, since it is larger than the sum of its proper divisors (3800918).

4049890 is a wasteful number, since it uses less digits than its factorization.

4049890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31173.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 4049890 is about 2012.4338498445. The cubic root of 4049890 is about 159.3973422478.

The spelling of 4049890 in words is "four million, forty-nine thousand, eight hundred ninety".