6240420 has 72 divisors (see below), whose sum is σ = 19461624. Its totient is φ = 1617408.

The previous prime is 6240419. The next prime is 6240431. The reversal of 6240420 is 240426.

6240420 is a `hidden beast` number, since 6 + 240 + 420 = 666.

6240420 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 451584 + 5788836 = 672^2 + 2406^2 .

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6240393 and 6240402.

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, 6192 + ... + 7128.

Almost surely, 2^6240420 is an apocalyptic number.

6240420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6240420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9730812).

6240420 is an abundant number, since it is smaller than the sum of its proper divisors (13221204).

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

6240420 is a wasteful number, since it uses less digits than its factorization.

6240420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 6240420 is about 2498.0832652256. The cubic root of 6240420 is about 184.1074120800.

Adding to 6240420 its reverse (240426), we get a palindrome (6480846).

The spelling of 6240420 in words is "six million, two hundred forty thousand, four hundred twenty".