442781156 has 6 divisors (see below), whose sum is σ = 774867030. Its totient is φ = 221390576.

The previous prime is 442781137. The next prime is 442781159. The reversal of 442781156 is 651187244.

It can be written as a sum of positive squares in only one way, i.e., 437646400 + 5134756 = 20920^2 + 2266^2 .

It is a super-3 number, since 3×442781156³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (442781159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55347641 + ... + 55347648.

It is an arithmetic number, because the mean of its divisors is an integer number (129144505).

Almost surely, 2^442781156 is an apocalyptic number.

It is an amenable number.

442781156 is a deficient number, since it is larger than the sum of its proper divisors (332085874).

442781156 is a wasteful number, since it uses less digits than its factorization.

442781156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110695293 (or 110695291 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 442781156 is about 21042.3657415225. The cubic root of 442781156 is about 762.1896433260.

The spelling of 442781156 in words is "four hundred forty-two million, seven hundred eighty-one thousand, one hundred fifty-six".