4259640 has 128 divisors (see below), whose sum is σ = 15966720. Its totient is φ = 883200.

The previous prime is 4259627. The next prime is 4259641. The reversal of 4259640 is 469524.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 4259598 and 4259607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4259641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9010 + ... + 9470.

It is an arithmetic number, because the mean of its divisors is an integer number (124740).

Almost surely, 2^4259640 is an apocalyptic number.

4259640 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 4259640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7983360).

4259640 is an abundant number, since it is smaller than the sum of its proper divisors (11707080).

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

4259640 is a wasteful number, since it uses less digits than its factorization.

4259640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 4259640 is about 2063.8895319275. The cubic root of 4259640 is about 162.1029676139.

The spelling of 4259640 in words is "four million, two hundred fifty-nine thousand, six hundred forty".