842775440 has 40 divisors (see below), whose sum is σ = 2110182648. Its totient is φ = 311178240.

The previous prime is 842775433. The next prime is 842775449. The reversal of 842775440 is 44577248.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 192321424 + 650454016 = 13868^2 + 25504^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (842775449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404141 + ... + 406220.

Almost surely, 2^842775440 is an apocalyptic number.

842775440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

842775440 is an abundant number, since it is smaller than the sum of its proper divisors (1267407208).

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

842775440 is a wasteful number, since it uses less digits than its factorization.

842775440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810387 (or 810381 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 41.

The square root of 842775440 is about 29030.5948957303. The cubic root of 842775440 is about 944.5768343233.

The spelling of 842775440 in words is "eight hundred forty-two million, seven hundred seventy-five thousand, four hundred forty".