8404990 has 32 divisors (see below), whose sum is σ = 16679520. Its totient is φ = 3024000.

The previous prime is 8404969. The next prime is 8404993. The reversal of 8404990 is 994048.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8404993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11640 + ... + 12340.

It is an arithmetic number, because the mean of its divisors is an integer number (521235).

Almost surely, 2^8404990 is an apocalyptic number.

8404990 is a deficient number, since it is larger than the sum of its proper divisors (8274530).

8404990 is a wasteful number, since it uses less digits than its factorization.

8404990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 8404990 is about 2899.1360782136. The cubic root of 8404990 is about 203.3195159173.

The spelling of 8404990 in words is "eight million, four hundred four thousand, nine hundred ninety".