540778 has 24 divisors (see below), whose sum is σ = 987552. Its totient is φ = 217512.

The previous prime is 540773. The next prime is 540779. The reversal of 540778 is 877045.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (540773) by changing a digit.

540778 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5001 + ... + 5107.

It is an arithmetic number, because the mean of its divisors is an integer number (41148).

2⁵⁴⁰⁷⁷⁸ is an apocalyptic number.

540778 is a deficient number, since it is larger than the sum of its proper divisors (446774).

540778 is a wasteful number, since it uses less digits than its factorization.

540778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 540778 is about 735.3760942538. The cubic root of 540778 is about 81.4716174520.

The spelling of 540778 in words is "five hundred forty thousand, seven hundred seventy-eight".