4020380 has 72 divisors (see below), whose sum is σ = 10616928. Its totient is φ = 1245312.

The previous prime is 4020361. The next prime is 4020407. The reversal of 4020380 is 830204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85517 + ... + 85563.

Almost surely, 2^4020380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4020380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5308464).

4020380 is an abundant number, since it is smaller than the sum of its proper divisors (6596548).

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

4020380 is a wasteful number, since it uses less digits than its factorization.

4020380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 4020380 is about 2005.0885267239. The cubic root of 4020380 is about 159.0092422406.

Adding to 4020380 its reverse (830204), we get a palindrome (4850584).

The spelling of 4020380 in words is "four million, twenty thousand, three hundred eighty".