786540 has 24 divisors (see below), whose sum is σ = 2202480. Its totient is φ = 209728.

The previous prime is 786491. The next prime is 786547. The reversal of 786540 is 45687.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 786498 and 786507.

It is not an unprimeable number, because it can be changed into a prime (786547) 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, 6495 + ... + 6614.

It is an arithmetic number, because the mean of its divisors is an integer number (91770).

2⁷⁸⁶⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

786540 is an abundant number, since it is smaller than the sum of its proper divisors (1415940).

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

786540 is a wasteful number, since it uses less digits than its factorization.

786540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13121 (or 13119 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 786540 is about 886.8709037960. The cubic root of 786540 is about 92.3081976468.

It can be divided in two parts, 786 and 540, that added together give a triangular number (1326 = T₅₁).

The spelling of 786540 in words is "seven hundred eighty-six thousand, five hundred forty".