824140 has 24 divisors (see below), whose sum is σ = 1753920. Its totient is φ = 325248.

The previous prime is 824137. The next prime is 824147. The reversal of 824140 is 41428.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (824147) 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, 1549 + ... + 2011.

It is an arithmetic number, because the mean of its divisors is an integer number (73080).

2⁸²⁴¹⁴⁰ is an apocalyptic number.

It is an amenable number.

824140 is an abundant number, since it is smaller than the sum of its proper divisors (929780).

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

824140 is a wasteful number, since it uses less digits than its factorization.

824140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 824140 is about 907.8215683712. The cubic root of 824140 is about 93.7562721730.

Adding to 824140 its reverse (41428), we get a palindrome (865568).

It can be divided in two parts, 8241 and 40, that added together give a square (8281 = 91²).

The spelling of 824140 in words is "eight hundred twenty-four thousand, one hundred forty".