3928555 has 8 divisors (see below), whose sum is σ = 4727232. Its totient is φ = 3134208.

The previous prime is 3928553. The next prime is 3928577. The reversal of 3928555 is 5558293.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3928555 - 2¹ = 3928553 is a prime.

It is a Duffinian number.

3928555 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3928553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1467 + ... + 3163.

It is an arithmetic number, because the mean of its divisors is an integer number (590904).

Almost surely, 2^3928555 is an apocalyptic number.

3928555 is a deficient number, since it is larger than the sum of its proper divisors (798677).

3928555 is a wasteful number, since it uses less digits than its factorization.

3928555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165.

The product of its digits is 54000, while the sum is 37.

The square root of 3928555 is about 1982.0582736136. The cubic root of 3928555 is about 157.7893229041.

It can be divided in two parts, 39285 and 55, that added together give a triangular number (39340 = T₂₈₀).

The spelling of 3928555 in words is "three million, nine hundred twenty-eight thousand, five hundred fifty-five".