3855420 has 36 divisors (see below), whose sum is σ = 11695320. Its totient is φ = 1028064.

The previous prime is 3855419. The next prime is 3855431. The reversal of 3855420 is 245583.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10530 + ... + 10889.

It is an arithmetic number, because the mean of its divisors is an integer number (324870).

Almost surely, 2^3855420 is an apocalyptic number.

3855420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3855420 is an abundant number, since it is smaller than the sum of its proper divisors (7839900).

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

3855420 is a wasteful number, since it uses less digits than its factorization.

3855420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21434 (or 21429 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 3855420 is about 1963.5223451746. The cubic root of 3855420 is about 156.8040342395.

It can be divided in two parts, 3855 and 420, that multiplied together give a triangular number (1619100 = T₁₇₉₉).

The spelling of 3855420 in words is "three million, eight hundred fifty-five thousand, four hundred twenty".