3801620 has 24 divisors (see below), whose sum is σ = 8049888. Its totient is φ = 1508000.

The previous prime is 3801619. The next prime is 3801631. The reversal of 3801620 is 261083.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 3801592 and 3801601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1895 + ... + 3345.

It is an arithmetic number, because the mean of its divisors is an integer number (335412).

Almost surely, 2^3801620 is an apocalyptic number.

It is an amenable number.

3801620 is an abundant number, since it is smaller than the sum of its proper divisors (4248268).

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

3801620 is a wasteful number, since it uses less digits than its factorization.

3801620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591 (or 1589 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 3801620 is about 1949.7743459180. The cubic root of 3801620 is about 156.0712473152.

The spelling of 3801620 in words is "three million, eight hundred one thousand, six hundred twenty".