3909090 has 16 divisors (see below), whose sum is σ = 9381888. Its totient is φ = 1042416.

The previous prime is 3909083. The next prime is 3909091. The reversal of 3909090 is 909093.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 130303 = 3909090 / (3 + 9 + 0 + 9 + 0 + 9 + 0).

It is an Ulam number.

3909090 is a modest number, since divided by 9090 gives 390 as remainder.

It is not an unprimeable number, because it can be changed into a prime (3909091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65122 + ... + 65181.

It is an arithmetic number, because the mean of its divisors is an integer number (586368).

Almost surely, 2^3909090 is an apocalyptic number.

3909090 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3909090 is an abundant number, since it is smaller than the sum of its proper divisors (5472798).

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

3909090 is a wasteful number, since it uses less digits than its factorization.

3909090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130313.

The product of its (nonzero) digits is 2187, while the sum is 30.

The square root of 3909090 is about 1977.1418765481. The cubic root of 3909090 is about 157.5282891992.

The spelling of 3909090 in words is "three million, nine hundred nine thousand, ninety".