7973428 has 6 divisors (see below), whose sum is σ = 13953506. Its totient is φ = 3986712.

The previous prime is 7973423. The next prime is 7973431. The reversal of 7973428 is 8243797.

It can be written as a sum of positive squares in only one way, i.e., 7683984 + 289444 = 2772^2 + 538^2 .

It is a d-powerful number, because it can be written as 7² + 9⁴ + 7⁸ + 3⁸ + 4⁸ + 2²¹ + 8⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7973423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996675 + ... + 996682.

Almost surely, 2^7973428 is an apocalyptic number.

It is an amenable number.

7973428 is a deficient number, since it is larger than the sum of its proper divisors (5980078).

7973428 is a wasteful number, since it uses less digits than its factorization.

7973428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993361 (or 1993359 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 7973428 is about 2823.7259073784. The cubic root of 7973428 is about 199.7783210497.

It can be divided in two parts, 797342 and 8, that multiplied together give a palindrome (6378736).

The spelling of 7973428 in words is "seven million, nine hundred seventy-three thousand, four hundred twenty-eight".