3906390 has 32 divisors (see below), whose sum is σ = 9538560. Its totient is φ = 1023584.

The previous prime is 3906373. The next prime is 3906401. The reversal of 3906390 is 936093.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667 + ... + 2873.

It is an arithmetic number, because the mean of its divisors is an integer number (298080).

Almost surely, 2^3906390 is an apocalyptic number.

3906390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3906390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4769280).

3906390 is an abundant number, since it is smaller than the sum of its proper divisors (5632170).

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

3906390 is a wasteful number, since it uses less digits than its factorization.

3906390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 3906390 is about 1976.4589547977. The cubic root of 3906390 is about 157.4920126965.

The spelling of 3906390 in words is "three million, nine hundred six thousand, three hundred ninety".