9077817420 has 720 divisors, whose sum is σ = 36334267200. Its totient is φ = 1889879040.

The previous prime is 9077817391. The next prime is 9077817439. The reversal of 9077817420 is 247187709.

It is a happy number.

It is a super-2 number, since 2×9077817420² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 292832805 + ... + 292832835.

It is an arithmetic number, because the mean of its divisors is an integer number (50464260).

Almost surely, 2^9077817420 is an apocalyptic number.

9077817420 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 9077817420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18167133600).

9077817420 is an abundant number, since it is smaller than the sum of its proper divisors (27256449780).

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

9077817420 is a wasteful number, since it uses less digits than its factorization.

9077817420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 9077817420 is about 95277.5808886855. The cubic root of 9077817420 is about 2086.0616920932.

The spelling of 9077817420 in words is "nine billion, seventy-seven million, eight hundred seventeen thousand, four hundred twenty".