9453990 has 64 divisors (see below), whose sum is σ = 27933696. Its totient is φ = 1994112.

The previous prime is 9453979. The next prime is 9453991. The reversal of 9453990 is 993549.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9453991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 999 + ... + 4461.

It is an arithmetic number, because the mean of its divisors is an integer number (436464).

Almost surely, 2^9453990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9453990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13966848).

9453990 is an abundant number, since it is smaller than the sum of its proper divisors (18479706).

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

9453990 is a wasteful number, since it uses less digits than its factorization.

9453990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3493.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 9453990 is about 3074.7341348481. The cubic root of 9453990 is about 211.4487130365.

Subtracting from 9453990 its reverse (993549), we obtain a triangular number (8460441 = T₄₁₁₃).

The spelling of 9453990 in words is "nine million, four hundred fifty-three thousand, nine hundred ninety".