442031420 has 12 divisors (see below), whose sum is σ = 928266024. Its totient is φ = 176812560.

The previous prime is 442031413. The next prime is 442031431. The reversal of 442031420 is 24130244.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 22101571 = 442031420 / (4 + 4 + 2 + 0 + 3 + 1 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 442031392 and 442031401.

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, 11050766 + ... + 11050805.

It is an arithmetic number, because the mean of its divisors is an integer number (77355502).

Almost surely, 2^442031420 is an apocalyptic number.

It is an amenable number.

442031420 is an abundant number, since it is smaller than the sum of its proper divisors (486234604).

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

442031420 is a wasteful number, since it uses less digits than its factorization.

442031420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22101580 (or 22101578 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 442031420 is about 21024.5432768467. The cubic root of 442031420 is about 761.7592095855.

Adding to 442031420 its reverse (24130244), we get a palindrome (466161664).

The spelling of 442031420 in words is "four hundred forty-two million, thirty-one thousand, four hundred twenty".