822919680 has 480 divisors, whose sum is σ = 3309216768. Its totient is φ = 186777600.

The previous prime is 822919679. The next prime is 822919693. The reversal of 822919680 is 86919228.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4308385 + ... + 4308575.

Almost surely, 2^822919680 is an apocalyptic number.

822919680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 822919680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1654608384).

822919680 is an abundant number, since it is smaller than the sum of its proper divisors (2486297088).

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

822919680 is a wasteful number, since it uses less digits than its factorization.

822919680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 822919680 is about 28686.5766518070. The cubic root of 822919680 is about 937.0997374002.

The spelling of 822919680 in words is "eight hundred twenty-two million, nine hundred nineteen thousand, six hundred eighty".