7072428 has 48 divisors (see below), whose sum is σ = 18184320. Its totient is φ = 2121600.

The previous prime is 7072421. The next prime is 7072441. The reversal of 7072428 is 8242707.

It is a junction number, because it is equal to n+sod(n) for n = 7072395 and 7072404.

It is not an unprimeable number, because it can be changed into a prime (7072421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17088 + ... + 17496.

It is an arithmetic number, because the mean of its divisors is an integer number (378840).

Almost surely, 2^7072428 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 7072428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9092160).

7072428 is an abundant number, since it is smaller than the sum of its proper divisors (11111892).

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

7072428 is a wasteful number, since it uses less digits than its factorization.

7072428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 7072428 is about 2659.4036925597. The cubic root of 7072428 is about 191.9506166397.

The spelling of 7072428 in words is "seven million, seventy-two thousand, four hundred twenty-eight".