8731990 has 16 divisors (see below), whose sum is σ = 15863760. Its totient is φ = 3460320.

The previous prime is 8731981. The next prime is 8731991. The reversal of 8731990 is 991378.

8731990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8731991) 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, 2916 + ... + 5095.

It is an arithmetic number, because the mean of its divisors is an integer number (991485).

Almost surely, 2^8731990 is an apocalyptic number.

8731990 is a deficient number, since it is larger than the sum of its proper divisors (7131770).

8731990 is a wasteful number, since it uses less digits than its factorization.

8731990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8127.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 8731990 is about 2954.9940778282. The cubic root of 8731990 is about 205.9227881685.

The spelling of 8731990 in words is "eight million, seven hundred thirty-one thousand, nine hundred ninety".