442667457 has 8 divisors (see below), whose sum is σ = 655803680. Its totient is φ = 295111620.

The previous prime is 442667441. The next prime is 442667473. The reversal of 442667457 is 754766244.

It is an interprime number because it is at equal distance from previous prime (442667441) and next prime (442667473).

It is not a de Polignac number, because 442667457 - 2⁴ = 442667441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442667417) 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, 8197519 + ... + 8197572.

It is an arithmetic number, because the mean of its divisors is an integer number (81975460).

Almost surely, 2^442667457 is an apocalyptic number.

It is an amenable number.

442667457 is a deficient number, since it is larger than the sum of its proper divisors (213136223).

442667457 is a wasteful number, since it uses less digits than its factorization.

442667457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16395100 (or 16395094 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 45.

The square root of 442667457 is about 21039.6638994068. The cubic root of 442667457 is about 762.1243984394.

The spelling of 442667457 in words is "four hundred forty-two million, six hundred sixty-seven thousand, four hundred fifty-seven".