4266640 has 80 divisors (see below), whose sum is σ = 11963520. Its totient is φ = 1382400.

The previous prime is 4266637. The next prime is 4266667. The reversal of 4266640 is 466624.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 4266599 and 4266608.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10440 + ... + 10840.

It is an arithmetic number, because the mean of its divisors is an integer number (149544).

Almost surely, 2^4266640 is an apocalyptic number.

4266640 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 4266640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5981760).

4266640 is an abundant number, since it is smaller than the sum of its proper divisors (7696880).

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

4266640 is a wasteful number, since it uses less digits than its factorization.

4266640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 4266640 is about 2065.5846629950. The cubic root of 4266640 is about 162.1917153145.

The spelling of 4266640 in words is "four million, two hundred sixty-six thousand, six hundred forty".