Search a number
-
+
442303989 = 3147434663
BaseRepresentation
bin11010010111010…
…000010111110101
31010211021101000020
4122113100113311
51401212211424
6111520035353
713650344001
oct3227202765
91124241006
10442303989
1120773a596
12104162b59
1370833a4a
1442a57701
1528c6d079
hex1a5d05f5

442303989 has 4 divisors (see below), whose sum is σ = 589738656. Its totient is φ = 294869324.

The previous prime is 442303987. The next prime is 442303993. The reversal of 442303989 is 989303244.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 442303989 - 21 = 442303987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442303989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442303987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73717329 + ... + 73717334.

It is an arithmetic number, because the mean of its divisors is an integer number (147434664).

Almost surely, 2442303989 is an apocalyptic number.

It is an amenable number.

442303989 is a deficient number, since it is larger than the sum of its proper divisors (147434667).

442303989 is a wasteful number, since it uses less digits than its factorization.

442303989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147434666.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 442303989 is about 21031.0244400980. The cubic root of 442303989 is about 761.9157514616.

The spelling of 442303989 in words is "four hundred forty-two million, three hundred three thousand, nine hundred eighty-nine".

Divisors: 1 3 147434663 442303989