7447887 has 12 divisors (see below), whose sum is σ = 11391120. Its totient is φ = 4673088.

The previous prime is 7447879. The next prime is 7447889. The reversal of 7447887 is 7887447.

It is not a de Polignac number, because 7447887 - 2³ = 7447879 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7447889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24187 + ... + 24492.

It is an arithmetic number, because the mean of its divisors is an integer number (949260).

Almost surely, 2^7447887 is an apocalyptic number.

7447887 is a deficient number, since it is larger than the sum of its proper divisors (3943233).

7447887 is a wasteful number, since it uses less digits than its factorization.

7447887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48702 (or 48699 counting only the distinct ones).

The product of its digits is 351232, while the sum is 45.

The square root of 7447887 is about 2729.0817136905. The cubic root of 7447887 is about 195.2889601539.

It can be divided in two parts, 74 and 47887, that added together give a square (47961 = 219²).

The spelling of 7447887 in words is "seven million, four hundred forty-seven thousand, eight hundred eighty-seven".