7897428 has 162 divisors, whose sum is σ = 26215098. Its totient is φ = 1995840.

The previous prime is 7897411. The next prime is 7897453. The reversal of 7897428 is 8247987.

It can be written as a sum of positive squares in only one way, i.e., 7683984 + 213444 = 2772^2 + 462^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 213426 + ... + 213462.

Almost surely, 2^7897428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7897428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13107549).

7897428 is an abundant number, since it is smaller than the sum of its proper divisors (18317670).

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

7897428 is a wasteful number, since it uses less digits than its factorization.

7897428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 60 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 7897428 is about 2810.2362889978. The cubic root of 7897428 is about 199.1415539571.

The spelling of 7897428 in words is "seven million, eight hundred ninety-seven thousand, four hundred twenty-eight".