9212857920 has 896 divisors, whose sum is σ = 40028774400. Its totient is φ = 1948852224.

The previous prime is 9212857919. The next prime is 9212857939. The reversal of 9212857920 is 297582129.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 51468391 + ... + 51468569.

Almost surely, 2^9212857920 is an apocalyptic number.

9212857920 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 9212857920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20014387200).

9212857920 is an abundant number, since it is smaller than the sum of its proper divisors (30815916480).

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

9212857920 is a wasteful number, since it uses less digits than its factorization.

9212857920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 9212857920 is about 95983.6336049016. The cubic root of 9212857920 is about 2096.3548192119.

The spelling of 9212857920 in words is "nine billion, two hundred twelve million, eight hundred fifty-seven thousand, nine hundred twenty".