612840 has 32 divisors (see below), whose sum is σ = 1838880. Its totient is φ = 163392.

The previous prime is 612823. The next prime is 612841. The reversal of 612840 is 48216.

612840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 612840.

It is not an unprimeable number, because it can be changed into a prime (612841) by changing a digit.

612840 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 7 ways as a sum of consecutive naturals, for example, 2434 + ... + 2673.

It is an arithmetic number, because the mean of its divisors is an integer number (57465).

2⁶¹²⁸⁴⁰ is an apocalyptic number.

612840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

612840 is an abundant number, since it is smaller than the sum of its proper divisors (1226040).

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

612840 is a wasteful number, since it uses less digits than its factorization.

612840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5121 (or 5117 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 612840 is about 782.8409800208. The cubic root of 612840 is about 84.9406737120.

The spelling of 612840 in words is "six hundred twelve thousand, eight hundred forty".