9420390 has 96 divisors (see below), whose sum is σ = 29502720. Its totient is φ = 2037312.

The previous prime is 9420347. The next prime is 9420391. The reversal of 9420390 is 930249.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9420391) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11577 + ... + 12363.

It is an arithmetic number, because the mean of its divisors is an integer number (307320).

Almost surely, 2^9420390 is an apocalyptic number.

9420390 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9420390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14751360).

9420390 is an abundant number, since it is smaller than the sum of its proper divisors (20082330).

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

9420390 is a wasteful number, since it uses less digits than its factorization.

9420390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 9420390 is about 3069.2653844202. The cubic root of 9420390 is about 211.1979155700.

The spelling of 9420390 in words is "nine million, four hundred twenty thousand, three hundred ninety".