4237840 has 20 divisors (see below), whose sum is σ = 9853164. Its totient is φ = 1695104.

The previous prime is 4237829. The next prime is 4237841. The reversal of 4237840 is 487324.

It can be written as a sum of positive squares in 2 ways, for example, as 2768896 + 1468944 = 1664^2 + 1212^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 4237799 and 4237808.

It is not an unprimeable number, because it can be changed into a prime (4237841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26407 + ... + 26566.

Almost surely, 2^4237840 is an apocalyptic number.

4237840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4237840 is an abundant number, since it is smaller than the sum of its proper divisors (5615324).

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

4237840 is a wasteful number, since it uses less digits than its factorization.

4237840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52986 (or 52980 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 4237840 is about 2058.6014670159. The cubic root of 4237840 is about 161.8259574753.

The spelling of 4237840 in words is "four million, two hundred thirty-seven thousand, eight hundred forty".