9213771840 has 1008 divisors, whose sum is σ = 39424173120. Its totient is φ = 1811496960.

The previous prime is 9213771823. The next prime is 9213771887. The reversal of 9213771840 is 481773129.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 9213771792 and 9213771801.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 151045410 + ... + 151045470.

Almost surely, 2^9213771840 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 9213771840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19712086560).

9213771840 is an abundant number, since it is smaller than the sum of its proper divisors (30210401280).

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

9213771840 is a wasteful number, since it uses less digits than its factorization.

9213771840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 9213771840 is about 95988.3942984776. The cubic root of 9213771840 is about 2096.4241367268.

The spelling of 9213771840 in words is "nine billion, two hundred thirteen million, seven hundred seventy-one thousand, eight hundred forty".