850315440 has 80 divisors (see below), whose sum is σ = 2838755808. Its totient is φ = 209307648.

The previous prime is 850315423. The next prime is 850315471. The reversal of 850315440 is 44513058.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 850315398 and 850315407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133149 + ... + 139388.

Almost surely, 2^850315440 is an apocalyptic number.

850315440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

850315440 is an abundant number, since it is smaller than the sum of its proper divisors (1988440368).

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

850315440 is a wasteful number, since it uses less digits than its factorization.

850315440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272566 (or 272560 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 850315440 is about 29160.1687237917. The cubic root of 850315440 is about 947.3854016320.

Adding to 850315440 its reverse (44513058), we get a palindrome (894828498).

The spelling of 850315440 in words is "eight hundred fifty million, three hundred fifteen thousand, four hundred forty".