4525640 has 48 divisors (see below), whose sum is σ = 11850300. Its totient is φ = 1550976.

The previous prime is 4525627. The next prime is 4525663. The reversal of 4525640 is 465254.

It can be written as a sum of positive squares in 2 ways, for example, as 4468996 + 56644 = 2114^2 + 238^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 806 + ... + 3114.

Almost surely, 2^4525640 is an apocalyptic number.

4525640 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 4525640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5925150).

4525640 is an abundant number, since it is smaller than the sum of its proper divisors (7324660).

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

4525640 is a wasteful number, since it uses less digits than its factorization.

4525640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334 (or 2323 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 4525640 is about 2127.3551654578. The cubic root of 4525640 is about 165.4093295845.

The spelling of 4525640 in words is "four million, five hundred twenty-five thousand, six hundred forty".