7855428 has 48 divisors (see below), whose sum is σ = 22184064. Its totient is φ = 2112000.

The previous prime is 7855427. The next prime is 7855447. The reversal of 7855428 is 8245587.

It is a zygodrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (7855423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1323 + ... + 4178.

It is an arithmetic number, because the mean of its divisors is an integer number (462168).

Almost surely, 2^7855428 is an apocalyptic number.

It is an amenable number.

7855428 is an abundant number, since it is smaller than the sum of its proper divisors (14328636).

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

7855428 is a wasteful number, since it uses less digits than its factorization.

7855428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5532 (or 5530 counting only the distinct ones).

The product of its digits is 89600, while the sum is 39.

The square root of 7855428 is about 2802.7536459703. The cubic root of 7855428 is about 198.7879022687.

The spelling of 7855428 in words is "seven million, eight hundred fifty-five thousand, four hundred twenty-eight".