4391490 has 16 divisors (see below), whose sum is σ = 10539648. Its totient is φ = 1171056.

The previous prime is 4391483. The next prime is 4391503. The reversal of 4391490 is 941934.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 146383 = 4391490 / (4 + 3 + 9 + 1 + 4 + 9 + 0).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73162 + ... + 73221.

It is an arithmetic number, because the mean of its divisors is an integer number (658728).

Almost surely, 2^4391490 is an apocalyptic number.

4391490 is an abundant number, since it is smaller than the sum of its proper divisors (6148158).

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

4391490 is a wasteful number, since it uses less digits than its factorization.

4391490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146393.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 4391490 is about 2095.5882229102. The cubic root of 4391490 is about 163.7585431512.

The spelling of 4391490 in words is "four million, three hundred ninety-one thousand, four hundred ninety".