8649390 has 16 divisors (see below), whose sum is σ = 20758608. Its totient is φ = 2306496.

The previous prime is 8649383. The next prime is 8649391. The reversal of 8649390 is 939468.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8649391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144127 + ... + 144186.

It is an arithmetic number, because the mean of its divisors is an integer number (1297413).

Almost surely, 2^8649390 is an apocalyptic number.

8649390 is an abundant number, since it is smaller than the sum of its proper divisors (12109218).

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

8649390 is a wasteful number, since it uses less digits than its factorization.

8649390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288323.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 8649390 is about 2940.9845290311. The cubic root of 8649390 is about 205.2714231420.

The spelling of 8649390 in words is "eight million, six hundred forty-nine thousand, three hundred ninety".