4020780 has 48 divisors (see below), whose sum is σ = 11854080. Its totient is φ = 1015488.

The previous prime is 4020773. The next prime is 4020781. The reversal of 4020780 is 870204.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (4020781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 624 + ... + 2903.

It is an arithmetic number, because the mean of its divisors is an integer number (246960).

Almost surely, 2^4020780 is an apocalyptic number.

It is an amenable number.

4020780 is an abundant number, since it is smaller than the sum of its proper divisors (7833300).

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

4020780 is a wasteful number, since it uses less digits than its factorization.

4020780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3558 (or 3556 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 4020780 is about 2005.1882704624. The cubic root of 4020780 is about 159.0145155056.

Adding to 4020780 its reverse (870204), we get a palindrome (4890984).

The spelling of 4020780 in words is "four million, twenty thousand, seven hundred eighty".