540015640 has 32 divisors (see below), whose sum is σ = 1223916480. Its totient is φ = 214427392.

The previous prime is 540015611. The next prime is 540015647. The reversal of 540015640 is 46510045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540015647) 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, 43792 + ... + 54751.

It is an arithmetic number, because the mean of its divisors is an integer number (38247390).

Almost surely, 2^540015640 is an apocalyptic number.

It is an amenable number.

540015640 is an abundant number, since it is smaller than the sum of its proper divisors (683900840).

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

540015640 is a wasteful number, since it uses less digits than its factorization.

540015640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98691 (or 98687 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 540015640 is about 23238.2365940275. The cubic root of 540015640 is about 814.3331466603. Note that the first 3 decimals are identical.

Adding to 540015640 its reverse (46510045), we get a palindrome (586525685).

The spelling of 540015640 in words is "five hundred forty million, fifteen thousand, six hundred forty".