613940 has 12 divisors (see below), whose sum is σ = 1289316. Its totient is φ = 245568.

The previous prime is 613903. The next prime is 613957. The reversal of 613940 is 49316.

613940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 126736 + 487204 = 356^2 + 698^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15329 + ... + 15368.

It is an arithmetic number, because the mean of its divisors is an integer number (107443).

2⁶¹³⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

613940 is an abundant number, since it is smaller than the sum of its proper divisors (675376).

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

613940 is a wasteful number, since it uses less digits than its factorization.

613940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30706 (or 30704 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 613940 is about 783.5432342890. The cubic root of 613940 is about 84.9914639640.

The spelling of 613940 in words is "six hundred thirteen thousand, nine hundred forty".