4591990 has 16 divisors (see below), whose sum is σ = 8901648. Its totient is φ = 1695456.

The previous prime is 4591949. The next prime is 4591991. The reversal of 4591990 is 991954.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4591991) 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, 17532 + ... + 17791.

It is an arithmetic number, because the mean of its divisors is an integer number (556353).

Almost surely, 2^4591990 is an apocalyptic number.

4591990 is a deficient number, since it is larger than the sum of its proper divisors (4309658).

4591990 is a wasteful number, since it uses less digits than its factorization.

4591990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35343.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 4591990 is about 2142.8929044635. The cubic root of 4591990 is about 166.2137614873.

The spelling of 4591990 in words is "four million, five hundred ninety-one thousand, nine hundred ninety".