822765420 has 72 divisors (see below), whose sum is σ = 2576246400. Its totient is φ = 212325120.

The previous prime is 822765403. The next prime is 822765457. The reversal of 822765420 is 24567228.

822765420 is a `hidden beast` number, since 8 + 227 + 6 + 5 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68145 + ... + 79304.

It is an arithmetic number, because the mean of its divisors is an integer number (35781200).

Almost surely, 2^822765420 is an apocalyptic number.

It is an amenable number.

822765420 is an abundant number, since it is smaller than the sum of its proper divisors (1753480980).

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

822765420 is a wasteful number, since it uses less digits than its factorization.

822765420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147495 (or 147490 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 822765420 is about 28683.8878118012. The cubic root of 822765420 is about 937.0411792190.

The spelling of 822765420 in words is "eight hundred twenty-two million, seven hundred sixty-five thousand, four hundred twenty".