816026240 has 32 divisors (see below), whose sum is σ = 1950814260. Its totient is φ = 326410240.

The previous prime is 816026221. The next prime is 816026243. The reversal of 816026240 is 42620618.

It can be written as a sum of positive squares in 2 ways, for example, as 742889536 + 73136704 = 27256^2 + 8552^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (816026243) 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, 636881 + ... + 638160.

Almost surely, 2^816026240 is an apocalyptic number.

816026240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

816026240 is an abundant number, since it is smaller than the sum of its proper divisors (1134788020).

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

816026240 is a wasteful number, since it uses less digits than its factorization.

816026240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275060 (or 1275048 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 816026240 is about 28566.1730023467. The cubic root of 816026240 is about 934.4757620593.

Adding to 816026240 its reverse (42620618), we get a palindrome (858646858).

The spelling of 816026240 in words is "eight hundred sixteen million, twenty-six thousand, two hundred forty".