8390540 has 12 divisors (see below), whose sum is σ = 17620176. Its totient is φ = 3356208.

The previous prime is 8390539. The next prime is 8390549. The reversal of 8390540 is 450938.

It is a super-2 number, since 2×8390540² = 140802322983200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8390549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209744 + ... + 209783.

It is an arithmetic number, because the mean of its divisors is an integer number (1468348).

Almost surely, 2^8390540 is an apocalyptic number.

It is an amenable number.

8390540 is an abundant number, since it is smaller than the sum of its proper divisors (9229636).

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

8390540 is a wasteful number, since it uses less digits than its factorization.

8390540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419536 (or 419534 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 8390540 is about 2896.6428844440. The cubic root of 8390540 is about 203.2029323052.

The spelling of 8390540 in words is "eight million, three hundred ninety thousand, five hundred forty".