9021378 has 32 divisors (see below), whose sum is σ = 18849600. Its totient is φ = 2874816.

The previous prime is 9021361. The next prime is 9021379. The reversal of 9021378 is 8731209.

It is a happy number.

It is a super-4 number, since 4×9021378⁴ (a number of 29 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (9021379) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 24000 + ... + 24372.

It is an arithmetic number, because the mean of its divisors is an integer number (589050).

Almost surely, 2^9021378 is an apocalyptic number.

9021378 is an abundant number, since it is smaller than the sum of its proper divisors (9828222).

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

9021378 is a wasteful number, since it uses less digits than its factorization.

9021378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 9021378 is about 3003.5608866810. The cubic root of 9021378 is about 208.1729484887.

The spelling of 9021378 in words is "nine million, twenty-one thousand, three hundred seventy-eight".