854640 has 60 divisors (see below), whose sum is σ = 2872584. Its totient is φ = 227712.

The previous prime is 854629. The next prime is 854647. The reversal of 854640 is 46458.

It is a tau number, because it is divible by the number of its divisors (60).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (854647) by changing a digit.

854640 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 11 ways as a sum of consecutive naturals, for example, 127 + ... + 1313.

2⁸⁵⁴⁶⁴⁰ is an apocalyptic number.

854640 is a gapful number since it is divisible by the number (80) 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 854640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1436292).

854640 is an abundant number, since it is smaller than the sum of its proper divisors (2017944).

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

854640 is a wasteful number, since it uses less digits than its factorization.

854640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206 (or 1197 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 854640 is about 924.4674142445. The cubic root of 854640 is about 94.8988766998.

The spelling of 854640 in words is "eight hundred fifty-four thousand, six hundred forty".