9128892780 has 576 divisors, whose sum is σ = 34395798528. Its totient is φ = 1989411840.

The previous prime is 9128892769. The next prime is 9128892793. The reversal of 9128892780 is 872988219.

9128892780 is a `hidden beast` number, since 91 + 288 + 9 + 278 + 0 = 666.

It is a super-2 number, since 2×9128892780² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 109986619 + ... + 109986701.

It is an arithmetic number, because the mean of its divisors is an integer number (59714928).

Almost surely, 2^9128892780 is an apocalyptic number.

9128892780 is a gapful number since it is divisible by the number (90) 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 9128892780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17197899264).

9128892780 is an abundant number, since it is smaller than the sum of its proper divisors (25266905748).

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

9128892780 is a wasteful number, since it uses less digits than its factorization.

9128892780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 9128892780 is about 95545.2394418477. The cubic root of 9128892780 is about 2089.9667111598.

The spelling of 9128892780 in words is "nine billion, one hundred twenty-eight million, eight hundred ninety-two thousand, seven hundred eighty".