614640 has 80 divisors (see below), whose sum is σ = 2062368. Its totient is φ = 150528.

The previous prime is 614639. The next prime is 614657. The reversal of 614640 is 46416.

It is a tau number, because it is divible by the number of its divisors (80).

It is a zygodrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3022 + ... + 3218.

2⁶¹⁴⁶⁴⁰ is an apocalyptic number.

614640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 614640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1031184).

614640 is an abundant number, since it is smaller than the sum of its proper divisors (1447728).

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

614640 is a wasteful number, since it uses less digits than its factorization.

614640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 614640 is about 783.9897958520. The cubic root of 614640 is about 85.0237534537.

The spelling of 614640 in words is "six hundred fourteen thousand, six hundred forty".