442620 has 36 divisors (see below), whose sum is σ = 1343160. Its totient is φ = 117984.

The previous prime is 442619. The next prime is 442633. The reversal of 442620 is 26244.

442620 = T₃₁ + T₃₂ + ... + T₁₃₈.

442620 is a `hidden beast` number, since 4 + 42 + 620 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 442593 and 442602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1050 + ... + 1409.

It is an arithmetic number, because the mean of its divisors is an integer number (37310).

2⁴⁴²⁶²⁰ is an apocalyptic number.

It is an amenable number.

442620 is an abundant number, since it is smaller than the sum of its proper divisors (900540).

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

442620 is a wasteful number, since it uses less digits than its factorization.

442620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 442620 is about 665.2969261916. The cubic root of 442620 is about 76.2097162471.

Adding to 442620 its reverse (26244), we get a palindrome (468864).

It can be divided in two parts, 4 and 42620, that added together give a palindrome (42624).

The spelling of 442620 in words is "four hundred forty-two thousand, six hundred twenty".