3928090 has 8 divisors (see below), whose sum is σ = 7070580. Its totient is φ = 1571232.

The previous prime is 3928069. The next prime is 3928091. The reversal of 3928090 is 908293.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3396649 + 531441 = 1843^2 + 729^2 .

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

It is not an unprimeable number, because it can be changed into a prime (3928091) 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, 196395 + ... + 196414.

Almost surely, 2^3928090 is an apocalyptic number.

3928090 is a deficient number, since it is larger than the sum of its proper divisors (3142490).

3928090 is a wasteful number, since it uses less digits than its factorization.

3928090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392816.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 3928090 is about 1981.9409678394. The cubic root of 3928090 is about 157.7830971265.

The spelling of 3928090 in words is "three million, nine hundred twenty-eight thousand, ninety".