325538640 has 120 divisors (see below), whose sum is σ = 1249467648. Its totient is φ = 74407680.

The previous prime is 325538599. The next prime is 325538641. The reversal of 325538640 is 46835523.

It is a happy number.

325538640 is a `hidden beast` number, since 3 + 2 + 5 + 5 + 3 + 8 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×325538640² = 211950812266099200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 325538595 and 325538604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325538641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27256 + ... + 37335.

Almost surely, 2^325538640 is an apocalyptic number.

325538640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

325538640 is an abundant number, since it is smaller than the sum of its proper divisors (923929008).

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

325538640 is a wasteful number, since it uses less digits than its factorization.

325538640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64617 (or 64608 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 325538640 is about 18042.6893782496. The cubic root of 325538640 is about 687.9140531722.

The spelling of 325538640 in words is "three hundred twenty-five million, five hundred thirty-eight thousand, six hundred forty".