442978851 has 16 divisors (see below), whose sum is σ = 678555648. Its totient is φ = 251803200.

The previous prime is 442978847. The next prime is 442978853. The reversal of 442978851 is 158879244.

It is a happy number.

It is not a de Polignac number, because 442978851 - 2² = 442978847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442978851.

It is not an unprimeable number, because it can be changed into a prime (442978853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51210 + ... + 59231.

It is an arithmetic number, because the mean of its divisors is an integer number (42409728).

Almost surely, 2^442978851 is an apocalyptic number.

442978851 is a deficient number, since it is larger than the sum of its proper divisors (235576797).

442978851 is a wasteful number, since it uses less digits than its factorization.

442978851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110642.

The product of its digits is 645120, while the sum is 48.

The square root of 442978851 is about 21047.0627641959. The cubic root of 442978851 is about 762.3030617792.

The spelling of 442978851 in words is "four hundred forty-two million, nine hundred seventy-eight thousand, eight hundred fifty-one".