4279840 has 48 divisors (see below), whose sum is σ = 10559808. Its totient is φ = 1636096.

The previous prime is 4279837. The next prime is 4279841. The reversal of 4279840 is 489724.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 4279796 and 4279805.

It is not an unprimeable number, because it can be changed into a prime (4279841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3099 + ... + 4261.

It is an arithmetic number, because the mean of its divisors is an integer number (219996).

Almost surely, 2^4279840 is an apocalyptic number.

4279840 is a gapful number since it is divisible by the number (40) 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 4279840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5279904).

4279840 is an abundant number, since it is smaller than the sum of its proper divisors (6279968).

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

4279840 is a wasteful number, since it uses less digits than its factorization.

4279840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201 (or 1193 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 4279840 is about 2068.7774167368. Note that the first 3 decimals coincide. The cubic root of 4279840 is about 162.3588043729.

The spelling of 4279840 in words is "four million, two hundred seventy-nine thousand, eight hundred forty".