9221787870 has 64 divisors (see below), whose sum is σ = 24067596096. Its totient is φ = 2251929600.

The previous prime is 9221787857. The next prime is 9221787917. The reversal of 9221787870 is 787871229.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225481 + ... + 263220.

It is an arithmetic number, because the mean of its divisors is an integer number (376056189).

Almost surely, 2^9221787870 is an apocalyptic number.

9221787870 is an abundant number, since it is smaller than the sum of its proper divisors (14845808226).

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

9221787870 is a wasteful number, since it uses less digits than its factorization.

9221787870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488765.

The product of its (nonzero) digits is 790272, while the sum is 51.

The square root of 9221787870 is about 96030.1404247646. The cubic root of 9221787870 is about 2097.0319271786.

The spelling of 9221787870 in words is "nine billion, two hundred twenty-one million, seven hundred eighty-seven thousand, eight hundred seventy".