8403990 has 48 divisors (see below), whose sum is σ = 23466672. Its totient is φ = 1920576.

The previous prime is 8403977. The next prime is 8404013. The reversal of 8403990 is 993048.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1389 + ... + 4328.

It is an arithmetic number, because the mean of its divisors is an integer number (488889).

Almost surely, 2^8403990 is an apocalyptic number.

8403990 is an abundant number, since it is smaller than the sum of its proper divisors (15062682).

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

8403990 is a wasteful number, since it uses less digits than its factorization.

8403990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5741 (or 5734 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 8403990 is about 2898.9636079123. The cubic root of 8403990 is about 203.3114521528.

The spelling of 8403990 in words is "eight million, four hundred three thousand, nine hundred ninety".