4023390 has 128 divisors (see below), whose sum is σ = 12441600. Its totient is φ = 827904.

The previous prime is 4023359. The next prime is 4023401. The reversal of 4023390 is 933204.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 174919 + ... + 174941.

It is an arithmetic number, because the mean of its divisors is an integer number (97200).

Almost surely, 2^4023390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4023390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6220800).

4023390 is an abundant number, since it is smaller than the sum of its proper divisors (8418210).

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

4023390 is a wasteful number, since it uses less digits than its factorization.

4023390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 4023390 is about 2005.8389765881. The cubic root of 4023390 is about 159.0489149767.

Adding to 4023390 its reverse (933204), we get a palindrome (4956594).

The spelling of 4023390 in words is "four million, twenty-three thousand, three hundred ninety".