3947028 has 12 divisors (see below), whose sum is σ = 9209760.
Its totient is φ = 1315672.
The previous prime is 3947023. The next prime is 3947051. The reversal of 3947028 is 8207493.
It is a tau number, because it is divible by the number of its divisors (12).
It is a self number, because there is not a number n which added to its sum of digits gives 3947028.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (3947023) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164448 + ... + 164471.
It is an arithmetic number, because the mean of its divisors is an integer number (767480).
Almost surely, 23947028 is an apocalyptic number.
It is an amenable number.
3947028 is an abundant number, since it is smaller than the sum of its proper divisors (5262732).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
3947028 is a wasteful number, since it uses less digits than its factorization.
3947028 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 328926 (or 328924 counting only the distinct ones).
The product of its (nonzero) digits is 12096, while the sum is 33.
The square root of 3947028 is about 1986.7128629976.
The cubic root of 3947028 is about 158.0362572349.
The spelling of 3947028 in words is "three million, nine hundred forty-seven thousand, twenty-eight".