4023720 has 48 divisors (see below), whose sum is σ = 13078260. Its totient is φ = 1072896.

The previous prime is 4023703. The next prime is 4023727. The reversal of 4023720 is 273204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3944196 + 79524 = 1986^2 + 282^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 4023693 and 4023702.

It is not an unprimeable number, because it can be changed into a prime (4023727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5229 + ... + 5948.

Almost surely, 2^4023720 is an apocalyptic number.

4023720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4023720 is an abundant number, since it is smaller than the sum of its proper divisors (9054540).

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

4023720 is a wasteful number, since it uses less digits than its factorization.

4023720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11194 (or 11187 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 4023720 is about 2005.9212347448. The cubic root of 4023720 is about 159.0532632756.

Adding to 4023720 its reverse (273204), we get a palindrome (4296924).

The spelling of 4023720 in words is "four million, twenty-three thousand, seven hundred twenty".