7891422 has 128 divisors (see below), whose sum is σ = 22118400. Its totient is φ = 1814400.

The previous prime is 7891421. The next prime is 7891423. The reversal of 7891422 is 2241987.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7891421) and next prime (7891423).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7891421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 254547 + ... + 254577.

It is an arithmetic number, because the mean of its divisors is an integer number (172800).

Almost surely, 2^7891422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7891422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11059200).

7891422 is an abundant number, since it is smaller than the sum of its proper divisors (14226978).

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

7891422 is a wasteful number, since it uses less digits than its factorization.

7891422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102.

The product of its digits is 8064, while the sum is 33.

The square root of 7891422 is about 2809.1674923365. The cubic root of 7891422 is about 199.0910587199.

It can be divided in two parts, 789 and 1422, that added together give a triangular number (2211 = T₆₆).

The spelling of 7891422 in words is "seven million, eight hundred ninety-one thousand, four hundred twenty-two".