3901890 has 32 divisors (see below), whose sum is σ = 9455616. Its totient is φ = 1030400.

The previous prime is 3901871. The next prime is 3901901. The reversal of 3901890 is 981093.

It is a happy number.

3901890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2815 + ... + 3965.

It is an arithmetic number, because the mean of its divisors is an integer number (295488).

Almost surely, 2^3901890 is an apocalyptic number.

3901890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3901890 is an abundant number, since it is smaller than the sum of its proper divisors (5553726).

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

3901890 is a wasteful number, since it uses less digits than its factorization.

3901890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 3901890 is about 1975.3202272037. The cubic root of 3901890 is about 157.4315146947.

The spelling of 3901890 in words is "three million, nine hundred one thousand, eight hundred ninety".