4002423390 has 288 divisors, whose sum is σ = 12929963904. Its totient is φ = 853493760.

The previous prime is 4002423379. The next prime is 4002423391. The reversal of 4002423390 is 933242004.

It is a happy number.

4002423390 is a `hidden beast` number, since 400 + 24 + 233 + 9 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002423391) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 14768955 + ... + 14769225.

It is an arithmetic number, because the mean of its divisors is an integer number (44895708).

Almost surely, 2^4002423390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4002423390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6464981952).

4002423390 is an abundant number, since it is smaller than the sum of its proper divisors (8927540514).

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

4002423390 is a wasteful number, since it uses less digits than its factorization.

4002423390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 502 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 4002423390 is about 63264.7088825990. The cubic root of 4002423390 is about 1587.7215615699.

Adding to 4002423390 its reverse (933242004), we get a palindrome (4935665394).

The spelling of 4002423390 in words is "four billion, two million, four hundred twenty-three thousand, three hundred ninety".