855042340 has 12 divisors (see below), whose sum is σ = 1795588956. Its totient is φ = 342016928.

The previous prime is 855042329. The next prime is 855042347. The reversal of 855042340 is 43240558.

It can be written as a sum of positive squares in 2 ways, for example, as 237221604 + 617820736 = 15402^2 + 24856^2 .

It is not an unprimeable number, because it can be changed into a prime (855042347) 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, 21376039 + ... + 21376078.

It is an arithmetic number, because the mean of its divisors is an integer number (149632413).

Almost surely, 2^855042340 is an apocalyptic number.

It is an amenable number.

855042340 is an abundant number, since it is smaller than the sum of its proper divisors (940546616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

855042340 is a wasteful number, since it uses less digits than its factorization.

855042340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42752126 (or 42752124 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 855042340 is about 29241.1070241877. The cubic root of 855042340 is about 949.1376625327.

Adding to 855042340 its reverse (43240558), we get a palindrome (898282898).

The spelling of 855042340 in words is "eight hundred fifty-five million, forty-two thousand, three hundred forty".