22778392320 has 576 divisors, whose sum is σ = 83669913600. Its totient is φ = 5939122176.

The previous prime is 22778392277. The next prime is 22778392363. The reversal of 22778392320 is 2329387722.

22778392320 is a `hidden beast` number, since 227 + 7 + 8 + 392 + 32 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (22778392277) and next prime (22778392363).

It is a tau number, because it is divible by the number of its divisors (576).

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 63 ways as a sum of consecutive naturals, for example, 221149389 + ... + 221149491.

Almost surely, 2^22778392320 is an apocalyptic number.

22778392320 is a gapful number since it is divisible by the number (20) 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 22778392320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41834956800).

22778392320 is an abundant number, since it is smaller than the sum of its proper divisors (60891521280).

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

22778392320 is an frugal number, since it uses more digits than its factorization.

22778392320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 22778392320 in words is "twenty-two billion, seven hundred seventy-eight million, three hundred ninety-two thousand, three hundred twenty".