7891436 has 12 divisors (see below), whose sum is σ = 15782928. Its totient is φ = 3382032.

The previous prime is 7891423. The next prime is 7891439. The reversal of 7891436 is 6341987.

7891436 is an admirable number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 7891436.

It is not an unprimeable number, because it can be changed into a prime (7891439) 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 3 ways as a sum of consecutive naturals, for example, 140891 + ... + 140946.

It is an arithmetic number, because the mean of its divisors is an integer number (1315244).

Almost surely, 2^7891436 is an apocalyptic number.

It is an amenable number.

7891436 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7891436 is a wasteful number, since it uses less digits than its factorization.

7891436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281848 (or 281846 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 7891436 is about 2809.1699841768. The cubic root of 7891436 is about 199.0911764542.

The spelling of 7891436 in words is "seven million, eight hundred ninety-one thousand, four hundred thirty-six".