442442457 has 6 divisors (see below), whose sum is σ = 639083562. Its totient is φ = 294961632.

The previous prime is 442442401. The next prime is 442442461. The reversal of 442442457 is 754244244.

It can be written as a sum of positive squares in only one way, i.e., 353026521 + 89415936 = 18789^2 + 9456^2 .

It is not a de Polignac number, because 442442457 - 2⁸ = 442442201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (442442477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24580128 + ... + 24580145.

It is an arithmetic number, because the mean of its divisors is an integer number (106513927).

Almost surely, 2^442442457 is an apocalyptic number.

It is an amenable number.

442442457 is a deficient number, since it is larger than the sum of its proper divisors (196641105).

442442457 is a wasteful number, since it uses less digits than its factorization.

442442457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49160279 (or 49160276 counting only the distinct ones).

The product of its digits is 143360, while the sum is 36.

The square root of 442442457 is about 21034.3161761917. The cubic root of 442442457 is about 761.9952517942.

The spelling of 442442457 in words is "four hundred forty-two million, four hundred forty-two thousand, four hundred fifty-seven".