8978923492920 has 1152 divisors, whose sum is σ = 34078516992000. Its totient is φ = 2118432476160.

The previous prime is 8978923492897. The next prime is 8978923492927. The reversal of 8978923492920 is 292943298798.

8978923492920 is a `hidden beast` number, since 8 + 97 + 8 + 9 + 23 + 492 + 9 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8978923492927) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 4482736639 + ... + 4482738641.

It is an arithmetic number, because the mean of its divisors is an integer number (29582046000).

Almost surely, 2^{8978923492920} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8978923492920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17039258496000).

8978923492920 is an abundant number, since it is smaller than the sum of its proper divisors (25099593499080).

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

8978923492920 is a wasteful number, since it uses less digits than its factorization.

8978923492920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117 (or 2092 counting only the distinct ones).

The product of its (nonzero) digits is 282175488, while the sum is 72.

The spelling of 8978923492920 in words is "eight trillion, nine hundred seventy-eight billion, nine hundred twenty-three million, four hundred ninety-two thousand, nine hundred twenty".