4392157642 has 4 divisors (see below), whose sum is σ = 6588236466. Its totient is φ = 2196078820.

The previous prime is 4392157573. The next prime is 4392157657. The reversal of 4392157642 is 2467512934.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2467512934 = 2 ⋅1233756467.

It can be written as a sum of positive squares in only one way, i.e., 4191397081 + 200760561 = 64741^2 + 14169^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098039409 + ... + 1098039412.

Almost surely, 2^4392157642 is an apocalyptic number.

4392157642 is a deficient number, since it is larger than the sum of its proper divisors (2196078824).

4392157642 is a wasteful number, since it uses less digits than its factorization.

4392157642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196078823.

The product of its digits is 362880, while the sum is 43.

The square root of 4392157642 is about 66273.3554454579. The cubic root of 4392157642 is about 1637.6684151471.

The spelling of 4392157642 in words is "four billion, three hundred ninety-two million, one hundred fifty-seven thousand, six hundred forty-two".