7887220 has 24 divisors (see below), whose sum is σ = 18069408. Its totient is φ = 2868000.

The previous prime is 7887181. The next prime is 7887221. The reversal of 7887220 is 227887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7887221) 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, 17706 + ... + 18145.

It is an arithmetic number, because the mean of its divisors is an integer number (752892).

Almost surely, 2^7887220 is an apocalyptic number.

It is an amenable number.

7887220 is an abundant number, since it is smaller than the sum of its proper divisors (10182188).

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

7887220 is a wasteful number, since it uses less digits than its factorization.

7887220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35871 (or 35869 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 7887220 is about 2808.4194843363. The cubic root of 7887220 is about 199.0557153155.

It can be divided in two parts, 788 and 7220, that added together give a palindrome (8008).

The spelling of 7887220 in words is "seven million, eight hundred eighty-seven thousand, two hundred twenty".