540625640 has 32 divisors (see below), whose sum is σ = 1224585000. Its totient is φ = 214796544.

The previous prime is 540625597. The next prime is 540625643. The reversal of 540625640 is 46526045.

It can be written as a sum of positive squares in 4 ways, for example, as 435890884 + 104734756 = 20878^2 + 10234^2 .

It is a junction number, because it is equal to n+sod(n) for n = 540625597 and 540625606.

It is not an unprimeable number, because it can be changed into a prime (540625643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39395 + ... + 51314.

Almost surely, 2^540625640 is an apocalyptic number.

It is an amenable number.

540625640 is an abundant number, since it is smaller than the sum of its proper divisors (683959360).

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

540625640 is a wasteful number, since it uses less digits than its factorization.

540625640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90869 (or 90865 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 540625640 is about 23251.3578098140. The cubic root of 540625640 is about 814.6396540155.

The spelling of 540625640 in words is "five hundred forty million, six hundred twenty-five thousand, six hundred forty".