4009390 has 64 divisors (see below), whose sum is σ = 9289728. Its totient is φ = 1209600.

The previous prime is 4009381. The next prime is 4009391. The reversal of 4009390 is 939004.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4009391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31507 + ... + 31633.

It is an arithmetic number, because the mean of its divisors is an integer number (145152).

Almost surely, 2^4009390 is an apocalyptic number.

4009390 is an abundant number, since it is smaller than the sum of its proper divisors (5280338).

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

4009390 is a wasteful number, since it uses less digits than its factorization.

4009390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 4009390 is about 2002.3461239256. The cubic root of 4009390 is about 158.8642222581.

The spelling of 4009390 in words is "four million, nine thousand, three hundred ninety".