4639890 has 32 divisors (see below), whose sum is σ = 11203776. Its totient is φ = 1229760.

The previous prime is 4639883. The next prime is 4639891. The reversal of 4639890 is 989364.

It is not an unprimeable number, because it can be changed into a prime (4639891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5964 + ... + 6696.

It is an arithmetic number, because the mean of its divisors is an integer number (350118).

Almost surely, 2^4639890 is an apocalyptic number.

4639890 is an abundant number, since it is smaller than the sum of its proper divisors (6563886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4639890 is a wasteful number, since it uses less digits than its factorization.

4639890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 4639890 is about 2154.0403895935. The cubic root of 4639890 is about 166.7897002652.

The spelling of 4639890 in words is "four million, six hundred thirty-nine thousand, eight hundred ninety".