3898890 has 24 divisors (see below), whose sum is σ = 10137348. Its totient is φ = 1039680.

The previous prime is 3898889. The next prime is 3898907. The reversal of 3898890 is 988983.

It can be written as a sum of positive squares in 2 ways, for example, as 3814209 + 84681 = 1953^2 + 291^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 21571 + ... + 21750.

Almost surely, 2^3898890 is an apocalyptic number.

3898890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3898890 is an abundant number, since it is smaller than the sum of its proper divisors (6238458).

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

3898890 is a wasteful number, since it uses less digits than its factorization.

3898890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43334 (or 43331 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 3898890 is about 1974.5607106392. The cubic root of 3898890 is about 157.3911568477.

The spelling of 3898890 in words is "three million, eight hundred ninety-eight thousand, eight hundred ninety".