840291222276 has 729 divisors, whose sum is σ = 2679828480693. Its totient is φ = 221761774080.

The previous prime is 840291222247. The next prime is 840291222289. The reversal of 840291222276 is 672222192048.

The square root of 840291222276 is 916674.

It is a perfect power (a square), and thus also a powerful number.

840291222276 is a `hidden beast` number, since 8 + 402 + 9 + 12 + 2 + 227 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 654205968900 + 186085253376 = 808830^2 + 431376^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 242 ways as a sum of consecutive naturals, for example, 19541656311 + ... + 19541656353.

Almost surely, 2^840291222276 is an apocalyptic number.

840291222276 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

840291222276 is the 916674-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840291222276

840291222276 is an abundant number, since it is smaller than the sum of its proper divisors (1839537258417).

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

840291222276 is a wasteful number, since it uses less digits than its factorization.

840291222276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 840291222276 in words is "eight hundred forty billion, two hundred ninety-one million, two hundred twenty-two thousand, two hundred seventy-six".