442936157 has 4 divisors (see below), whose sum is σ = 446856060. Its totient is φ = 439016256.

The previous prime is 442936147. The next prime is 442936177. The reversal of 442936157 is 751639244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 196728676 + 246207481 = 14026^2 + 15691^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442936157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442936147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1959782 + ... + 1960007.

It is an arithmetic number, because the mean of its divisors is an integer number (111714015).

Almost surely, 2^442936157 is an apocalyptic number.

It is an amenable number.

442936157 is a deficient number, since it is larger than the sum of its proper divisors (3919903).

442936157 is a wasteful number, since it uses less digits than its factorization.

442936157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3919902.

The product of its digits is 181440, while the sum is 41.

The square root of 442936157 is about 21046.0484889682. The cubic root of 442936157 is about 762.2785709091.

The spelling of 442936157 in words is "four hundred forty-two million, nine hundred thirty-six thousand, one hundred fifty-seven".