8540390 has 8 divisors (see below), whose sum is σ = 15372720. Its totient is φ = 3416152.

The previous prime is 8540387. The next prime is 8540393. The reversal of 8540390 is 930458.

It is an interprime number because it is at equal distance from previous prime (8540387) and next prime (8540393).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×8540390² = 145876522704200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8540393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427010 + ... + 427029.

It is an arithmetic number, because the mean of its divisors is an integer number (1921590).

Almost surely, 2^8540390 is an apocalyptic number.

8540390 is a deficient number, since it is larger than the sum of its proper divisors (6832330).

8540390 is a wasteful number, since it uses less digits than its factorization.

8540390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854046.

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

The square root of 8540390 is about 2922.3945661050. The cubic root of 8540390 is about 204.4054955165.

The spelling of 8540390 in words is "eight million, five hundred forty thousand, three hundred ninety".