442170172 has 12 divisors (see below), whose sum is σ = 790261920. Its totient is φ = 216381056.

The previous prime is 442170137. The next prime is 442170173. The reversal of 442170172 is 271071244.

It is a super-2 number, since 2×442170172² = 391028922013019168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 442170172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442170173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1175797 + ... + 1176172.

It is an arithmetic number, because the mean of its divisors is an integer number (65855160).

Almost surely, 2^442170172 is an apocalyptic number.

It is an amenable number.

442170172 is a deficient number, since it is larger than the sum of its proper divisors (348091748).

442170172 is a wasteful number, since it uses less digits than its factorization.

442170172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352020 (or 2352018 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 442170172 is about 21027.8427804661. The cubic root of 442170172 is about 761.8389056974.

The spelling of 442170172 in words is "four hundred forty-two million, one hundred seventy thousand, one hundred seventy-two".